For the following set of data, find the percentage of data within population standarddeviations of the mean, to the nearest percent.88, 92, 57, 62, 57, 56, 58, 57Copy Values for CalculatorOpen Statistics Calculator
Answers
Answer: 100 %
Explanation:
The first step is to rearrange the numbes in ascending order. It becomes
56, 57, 57, 57, 58, 62, 88, 92
The next step is to calculate the population μ, mean.
μ = sum of terms/number of terms
From the information given
n = number of terms = 8
μ = (56 + 57 + 57 + 57 + 58 + 62 + 88 + 92)/8 = 65.875
μ = 65.875
The formula for calculating the population standard deviation, σ is
σ = √[Σ(x - μ)^2]/n
Σ(x - μ)^2/n = [(56 - 65.875)^2 + (57 - 65.875)^2 + (57 - 65.875)^2 + (57 - 65.875)^2 + (58 - 65.875)^2 + (62 - 65.875)^2 + (88 - 65.875)^2 + (92 - 65.875)^2)]/8 = 197.859375
σ = √197.859375
σ = 14.1
2 population standard deviations to the left of the mean = 65.875 - 2(14.1) = 37.675
2 population standard deviations to the rig tof the mean = 685875 -+2(14.1) == 94.075
Number of terms between 37.675 and 94.075 = 8
Thus,
the percentage of data within 2 population standard deviations of the mean
= 8/8 x 100 = 100%
Related Questions
For any number a, |a|=A-1B. sqrt a^2C. 1D. a^2
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EXPLANATION
The module of any number, as in this case |a|, is the same number with positive sign, in this case the appropiate option is sqrt(a^2) ---> OPTION B.
If u= {1,2,3,4,5,6,7,8,9} a = the event of drawing an odd B= the event of drawing prime number Find p( A unión b)
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Using venn diagrams:
Therefore, the union will be given by:
[tex]P(A\cup B)=\mleft\lbrace1,2,3,5,7,9\mright\rbrace[/tex]How do I solve angle measurements and find the value of x on a polygon
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ANSWER and EXPLANATION
We want to find out how to find the measurement of angles in a regular polygon.
To do this, first we have to know the total angle in the entire polygon.
To find this, we use the formula:
Total Angle = 180(n - 2)
where n = number of sides of the polygon
Now, after finding that total angle, we can find the individual angles in the polygon by dividing that total angle by the number of angles in the polygon.
For example, consider the diagram below:
Let us take that as a regular pentagon with 5 sides.
This means that n = 5.
Therefore, the total angle in the pentagon is:
Total Angle = 180(5 - 2)
Total Angle = 180 * 3 = 540 degrees.
Now, there are 5 angles in the polygon. Therefore, the value of x is:
[tex]x\text{ = }\frac{540}{5}=108^o[/tex]That is how to find the individual angles in a polygon.
Find the surface area of the pyramid. Round your answer to the nearest hundredth.
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Okay, here we have this:
Considering the provided information, we are going to calculate the surface area of the pyramid, so we obtain the following:
Let's use the following formula to find the surface area:
Surface area=Area of the base+1/2*Perimeter of the base*Slant Height
Replacing:
Surface area=(12.2ft¨* 12.2 ft)+1/2 * (12.2 ft * 4) * 9.5ft
Surface area=148.84 ft² + 1/2 * 48.8 ft * 9.5 ft
Surface area=148.84 ft² + 231.8 ft²
Surface area=380.64 ft²
Finally we obtain that the correct answer is the first option.
can someone please help I've gone through 4 different teachers
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a) see graph below
b) The coordinate of F" = (12/13, 0)
c) cos(D") = 12/13
sin(D") = 5/13
tan(D") = 5/12
Explanation:Given:
A triangle on a coordinate with the units on the vertical and horizontal axis unlabeled
To find:
To label the diagram D"E"F" and determine the coordinates of F"
To label the diagram, we will use the previous diagrams and solutions.
From the information given, the new diagram is similar to the triangle DEF
For similar triangles, the ratio of their corresponding sides will be equal. Also, the corresponding angles are also equal
This means D corresponds to D", E corresponds to E" and F corresponds to F"
labeling the diagram:
b) To get the coordinates of F', we will use the similarity theorem about ratio of corresponding sides:
we have the hypotenuse = 1
the adjacent or base = not given
To get the base, we will use cosine ratio (CAH)
cos D" = adj/hyp
let the adjacent = b
cosD" = b/1
From previous solution of cos D and cos D', the result was 12/13
equating the ratio:
[tex]\begin{gathered} cosD^{\prime}^{\prime}\text{ = }\frac{b}{1}\text{ } \\ cos\text{ D = 12/13} \\ cos\text{ D = cos D'' \lparen similarity theorem\rparen} \\ \frac{b}{1}\text{ = }\frac{12}{13} \\ b\text{ = 12/13} \end{gathered}[/tex]This means the x coordiante of E" = 12/13
Next, we will find the opposite
sin D" = opp/hyp
sinD'' = opp/1
sin D = 5/13
sin D = sin D" (similarity theorem)
[tex]\begin{gathered} \frac{5}{13}=\frac{opp}{1}\text{ } \\ opp\text{ = 5/13} \end{gathered}[/tex]The coordinates of D"E"F":
The coordinate of F" = (12/13, 0)
How: This was determined using the similarity theorem. Comparing the ratio of the corresponding sides of triangle DEF with triangle D"E"F".
cos(D") , sin(D") and tan(D") will have same value as cos (D), sin(D) and tan (D) respectively.
This is because they are similar triangles and the corresponding angles in similar triangles are equal
cos(D") = 12/13
sin(D") = 5/13
tan(D") = 5/12
which one of the following options is true when considering the expansion of the binomial expression (x+y)^4?A) The sum of the exponents of each term of the expansion of (x+y)^4 is 5.B) The expansion of (x+y)^4 will yield 4 termsC) The last term of the expansion of (x+y)^4 is y^4D) The coefficients of the expansion of (x+y)^4 are: 1,4,4,1.
Answers
Given:
[tex](x+y)^4[/tex]To Determine: The binomial expansion of the given
Solution
Using binomial expansion formula below
[tex](x+y)^n=\sum_{k\mathop{=}0}^n(^n_k)x^{n-k}y^k[/tex]es? Explain your reasoning.
35. MP MODELING REAL LIFE A planet orbiting a star
at a distance such that its temperatures are right for
liquid water is said to be in the star's habitable zone. The
habitable zone of a particular star is at least 0.023 AU
and at most 0.054 AU from the star (1 AU is equal to the
distance between Earth and the Sun). Draw a graph tha
represents the habitable zone.
the distanco
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♥it must orbit in a zone where liquid water is possible♥
a. Use symbols and proper notation to name the angle shown on thegraph. Write all three correct names.
Answers
The correct names are:
∠RST (the three points involved with the vertex at the middle)
∠TSR (same as the previous name, but with other order)
∠S (the letter of the vertex)
Identify all of the functions below. { ( 5 , 1 ) , ( 2 , 2 ) , ( 6 , 6 ) , ( 3 , 4 ) , ( 1 , 1 ) } x y 7 3 0 5 1 3 5 5 3 0 { ( 5 , 1 ) , ( − 5 , 2 ) , ( 2 , 6 ) , ( 6 , 4 ) , ( − 2 , 1 ) } { ( 5 , 1 ) , ( 2 , 2 ) , ( 2 , 6 ) , ( 2 , 4 ) , ( 1 , 1 ) } { 3 , 5 , 9 , 7 , 7 } x y 2 3 2 5 1 3 8 2 5 0
Answers
The relations and tables that represent a function include the following:
A. {(5, 1), (2, 2), (6, 6), (3, 4), (1, 1)}.
B. x 7 3 0 5 1
y 3 5 5 3 0
C. {(5, 1), (−5, 2), (2, 6), (6, 4), (-2, 1)}.
What is a function?In Mathematics, a function can be defined as a mathematical expression which is typically used for defining and representing the relationship that exists between two or more variables such as an ordered pair in tables or relations.
This ultimately implies that, a function is typically used in mathematics for uniquely mapping an input variable (domain) to an output variable (range).
In this context, the given relation {(5, 1), (2, 2), (2, 6), (2, 4), (1, 1)} is not considered as a function because it has the same input variable (domain) that is mapped to different output variable (range) i.e (2, 2) and (2, 6).
Additionally, the given relation {3, 5, 9, 7, 7} would be classified as a set and not a function.
In conclusion, the table shown below does not represent a function because the same input variable (domain) that is mapped to different output variable (range) i.e (2, 3) and (2, 2).
x 2 3 2 5 1
y 3 8 2 5 0
Read more on function here: brainly.com/question/3632175
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write each ratio as a fraction in its simplest form12/10
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The given ratio is,
[tex]\frac{12}{10}[/tex]Taking 2 as common from both 12 and 10 we have,
[tex]\frac{12}{10}=\frac{6\times2}{5\times2}=\frac{6}{5}[/tex]As there is no common factor between 6 and 5. it cannot be simplified further as fraction.
Thus, the answer is 6/5
Q. A student earned a grade of 80% on a math test that had 30 problems. How manyProblems on this test did the students answer correctly
Answers
In order to calculate how many answers the student did correctly, we just need to find 80% of 30, that is, the product of 80% and 30.
Knowing that 80% corresponds to 0.8, we have:
[tex]80\text{\% of }30=0.8\cdot30=24[/tex]So the students answered 24 questions correctly.
Which equation is parallel to the above equation and passes through the point (35, 30)?Group of answer choicesy=5/7x +79y=5/7x +30y= 5/7x +10y= 5/7x + 5
Answers
Notice that all the options contain the term
[tex]\frac{5}{7}x[/tex]Setting x=35, we obtain
[tex]\frac{5}{7}(35)=5\cdot5=25[/tex]Finally,
[tex]30=25+5[/tex]Then, the answer is
[tex]\begin{gathered} y=\frac{5}{7}x+5 \\ \text{set x=35} \\ \Rightarrow y=\frac{5}{7}\cdot35+5=25+5=30 \end{gathered}[/tex]Option D is the answer, y=5x/7+5.
Notice that all the options have the same slope as that of the line y=5x/+10
Which best describes one way to show 1/3 shaded.
Answers
Draw a circle, cut into 3 equals parts and shade 1 part
The same set of data has been fit using two different functions. The following images show the residual plots of each function. A residual plot where the points are scattered around the x-axis with no pattern.© 2018 StrongMind. Created using GeoGebra. A residual plot where the points are scattered in a u-shape.© 2018 StrongMind. Created using GeoGebra. Which function is a better fit for the data, and why?Select the option that correctly answers both questions.
Answers
Answer:
Function B, because the points have more variation around the x-axis.
Step-by-step explanation:
Remember that if the points in a residual plot are randomly dispersed around the horizontal axis, a regression model is appropriate for the data. Therefore, the function that is the best fit for the data is function B, because the points have more variation around the x-axis.
you mix 1/2 cup of oats for every 1/4 cup of honey to make 12 cups of granol. How much oats and honey do you use?
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Given that you mix 1/2 cup of oats for 1/4 cup of honey to make 12 cups of granol, we can write this as:
[tex]undefined[/tex]what is 12/1020 in algorithm
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Answer:
12/1020=
0 R 12
Step-by-step explanation:
. Find the value of each expression. Show your work. (a) 1.42 (b) 300 = 2(0.5 +4.5) ? 3 ) te) -23
Answers
For the first expression, we have 1.4², this can be expressed as 1.4×1.4 and then we get:
[tex]1.4^2=1.4\times1.4=1.96[/tex]For the second expression, 300 ÷ 2(0.5 + 4.5)² we must start by solving the sum inside the parenthesis, then we get:
300 ÷ 2(0.5 + 4.5)² = 300 ÷ 2(5)²
Then, solve the exponent on the right of the division symbol:
300 ÷ 2(5)² = 300 ÷ 2×25
Now, solve the multiplication
300 ÷ 2×25 = 300 ÷ 50
Now, we can solve the division
300 ÷ 50 = 6
Then, 300 ÷ 2(0.5 + 4.5)² = 6
For the last expression, we must start with the exponent:
[tex]\begin{gathered} \frac{1}{3}\div2(\frac{1}{2})^3 \\ \frac{1}{3}\div2\times\frac{1}{2^3} \\ \frac{1}{3}\div2\times\frac{1}{8}^{} \end{gathered}[/tex]Now we can solve the multiplication:
[tex]\frac{1}{3}\div2\times\frac{1}{8}^{}=\frac{1}{3}\div\frac{2}{8}^{}[/tex]In order to divide one fraction by another one we just have to keep the first fraction unchanged, change the ÷ for a × and flip the second fraction, like this:
[tex]\frac{1}{3}\div\frac{2}{8}^{}=\frac{1}{3}\times\frac{8}{2}=\frac{1\times8}{3\times2}=\frac{8}{6}=\frac{4}{3}[/tex]Then, the value of the last expression is 4/3
A company sells a product for $72 each. The variable costs are $15 per unit and fixed costs are $29,697 per month
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Step 1
Given;
Step 2
A)
[tex]\begin{gathered} Revenue=\text{ Number of units sold }\times\text{ cost per unit} \\ Let\text{ each quant}\imaginaryI\text{ty of good sold be x} \\ cost\text{ per unit= \$72} \\ TR=72\times x=72x \\ \end{gathered}[/tex][tex]\begin{gathered} B)\text{ }total\text{ cost=f}\imaginaryI\text{xed cost + var}\imaginaryI\text{able cost} \\ TC=29697+15x \end{gathered}[/tex]C)At breakeven, TR = TC
[tex]\begin{gathered} 72n=29697+15x \\ 72x-15x=29697 \\ 57x=29697 \\ x=\frac{29697}{57}=521 \end{gathered}[/tex]the number of units needed to breakeven is 521
D) To calculate the TR, we substitute 521 for n in the given function for TR as seen below:
[tex]\begin{gathered} TR=72x \\ TR=72(521)=\text{ \$}37512 \end{gathered}[/tex]TR = $37512
Answers;
[tex]\begin{gathered} A)\text{ 72x} \\ B)\text{ 29697 +15x} \\ C)\text{ 521 units} \\ D)\text{ \$37512} \end{gathered}[/tex]
PERCENT PROBLEMS The local toy store manager found all the wrong percents marked on the following toys. The ball is 35% off, the game system is 45% off, the doll and airplane are both 65% off. Find the sale prices if the dump truck's sale price was the original price of the doll and the ball. The original price of the game system was $280 more than the sale price of the dump truck and $10 less than the original price of the airplane. to spe PLATTEGRONY
Answers
The sale prices of the toys obtained from their original prices and the percentage discounts are;
Toy [tex]{}[/tex] The selling price of the
Truck [tex]{}[/tex] $16.99
Ball [tex]{}[/tex] $11.04
Doll [tex]{}[/tex] $5.95
Game system [tex]{}[/tex] $192.97
Airplane [tex]{}[/tex] $107.41
What is a percentage?A percentage is the expression of a ratio or fraction between two quantities in which the denominator of the fraction is 100.
From the a similar question online, we have;
The price of the truck = $16.99
The original price of the doll = $16.99
Original price of the ball = $16.99
Original price of the game system = $280 + $16.88 = $296.88
Original price of the airplane = $296.88 + $10 = $306.88
The sale prices are therefore;
Sale price of the ball = $16.99 - 35% × $16.99 ≈ $11.04
Sale price of the doll = $16.99 - 65% × $16.99 ≈ $5.95
Sale price of the game system = $296.88 - 35% × $296.88 ≈ $192.97
Sale price of the airplane = $306.88 - 65% × $306.88 = $107.41
Learn more about percentages here:
https://brainly.com/question/24339661
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A set of data items normally distributed with a mean of 60. Convert the data item to a z-score, if the data item is 47 and standard deviation is 13.
Answers
To answer this question, we need to remember what the z-score is. The formula for it is as follows:
[tex]z_{\text{scorre}}=\frac{x-\mu}{\sigma}[/tex]We have that:
• mu is the population mean
,• x is the raw score we want to normalize or convert into a z-score
,• sigma is the population standard deviation.
Then, since we have that the mean is equal to 60, the raw score, x, is equal to 47, and the standard deviation is 13, then, we have that the z-score is:
[tex]z_{\text{score}}=\frac{47-60}{13}=\frac{-13}{13}\Rightarrow z_{score}=-1[/tex]Then, the z-score is equal to -1. That is, x is one standard deviation below the population mean.
A hot air balloon is sitting on the ground. Hot air was added causing the balloonto ascend at a rate of 4 feet per second for 60 seconds.A. Use integers to write an expression to determine the location of the airballoon relative to its starting location.
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Since the rate in which the balloon ascends is constant this means that we can represent its altitude (the location relative to its starting point) as a linear function.
A linear funtion is given by:
[tex]y=mx+b[/tex]where m is the slope or rate of change and b is the y-intecept (the value of y when x=0).
In our case let x be the time it passes since the balloon started ascending and let y be its altitude. With this definition for the variables we conclude that in our case the rate of change is 4 and, since the ballon started on the ground, the valur of b is zero. Therefore the expression we need is:
[tex]y=4x[/tex]Note:
It is important to notice that this expression is only valid for:
[tex]0\leq x\leq60[/tex]This comes from the fact that that the balloon ascends at that rate for 60 seconds and the fact that the time can't be negative.
Answer: The answer to that would be y=4 x 60 or just write it as y= 240
But in expression form it would be 0<_x<_60
Hope this helps.
Describe the association represented in the graph.no associationstrong, negativestrong positive D weak, negative.
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Given:
the scatter plot is shown in the graph
We will Describe the association represented in the graph.
As shown, when drawing a line of best fit of the points, the line will be with a negative slope that will be a strong negative
So, the answer will be: strong, negative
Find the slope and y-intercept write y-intercept as order pair
Answers
The slope and y-intercept of a line.
The equation of a line can be expressed as:
y = mx + b
Where m is the slope and b is the y-intercept. The slope of a line that passes through the points (x1,y1) and (x2,y2) is calculated as:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]The figure shows a horizontal red line. We only need two points (or ordered pairs) to calculate the slope. Let's get them from the graph: (0,-5) and (2,-5).
Calculate the slope:
[tex]m=\frac{-5-(-5)}{2-0}=\frac{-5+5}{2}=0[/tex]The slope is 0.
The y-intercept, as shown in the equation of the line, is the value of y when x=0.
Looking at the graph, we can identify the value of y=-5 when x=0. In fact, y=-5 for any value of x.
Thus, the y-intercept as an ordered pair is (0,-5)
what is 80% of 685?
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To know the percentage of a quantity, we have to divide the percentage we want to know (in this case 80%), over 100%. Then, that part has to be multiplied by that result as it is the part that corresponds to 80%.
0. Dividing 80% over 100%
[tex]\frac{80}{100}=0.8[/tex]2. Multiplying by the quantity
[tex]0.8\times685=548[/tex]Answer: 548
12² × 5 + 5 .........
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The solution to the given expression will be,
[tex]12^2\times5+5=144\times5+5=720+5=725[/tex]f(x) = x +4g(x) = 3x2 – 7Find (f .g)(x).A. (f-9)(x) = 3.73 – 28O B. (f.g)(x) = 3x2 + 12x2 – 7x - 28OC. (f.g)(x) = 3.r3 +28O D. (f.g)(x) = 3.7° + 12.2 - 72 +28
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Recall that:
[tex](f\cdot g)(x)=f(x)\cdot g(x)\text{.}[/tex]Substituting f(x)=x+4 and g(x)=3x²-7 we get:
[tex]\begin{gathered} (f\cdot g)(x)=_{}(x+4)(3x^2-7), \\ (f\cdot g)(x)=3x^3-7x+12x^2-28, \\ (f\cdot g)(x)=3x^3+12x^2-7x-28. \end{gathered}[/tex]Answer: Option B.
I need help with my math
Answers
Let's evaluate the point into the equation in order to check if it satisfies it.
[tex]\begin{gathered} y=4x+2;_{\text{ }}(2,10) \\ x=2,y=10 \\ so\colon \\ 10=4(2)+2=8+2=10 \\ 10=10 \\ This_{\text{ }}is_{\text{ }}true \end{gathered}[/tex]Therefore, the ordered pair is a solution to the equation
The population of a small town in central Florida has shown a linear decline in the years 1985-1997. In 1985 the population was 46000 people. In 1997 it was 38080 people.
Answers
Given:
(1985,46000)
(1997,38080)
(a)
General linear equation is:
[tex]y=mx+c[/tex]here y represent the population and x represent time so equation is:
[tex]p=mt+c[/tex][tex]\begin{gathered} \text{slope}=m \\ m=\frac{p_2-p_1_{}}{t_2-t_1} \end{gathered}[/tex][tex]\begin{gathered} (p_1,t_1)=(1985,46000) \\ (p_2,t_2)=(1997,38080) \end{gathered}[/tex]
slope is:
[tex]\begin{gathered} m=\frac{p_2-p_1}{t_2-t_1} \\ m=\frac{38080-46000}{1997-1985} \\ m=\frac{-7920}{12} \\ m=-660 \end{gathered}[/tex]So equation is:
[tex]\begin{gathered} p=mt+c \\ p=-660t+c \end{gathered}[/tex]Point (1985,46000)
[tex]\begin{gathered} p=-660t+c \\ p=46000 \\ t=1985 \\ p=-660t+c \\ 46000=-660(1985)+c \\ c=46000+1310100 \\ c=1356100 \end{gathered}[/tex]So equation is:
[tex]\begin{gathered} p=mt+c \\ p=-660t+1356100 \end{gathered}[/tex](b)
population in 2000.
[tex]t=2000[/tex][tex]\begin{gathered} p=mt+c \\ p=-660t+1356100 \\ t=2000 \\ p=-660(2000)+1356100 \\ p=36100 \end{gathered}[/tex]so population in 2000 is 36100.
For / (x) = 4x+1 and g(x)=x2-5, find
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We need to find g(x)/f(x) so we will put them over each other as a fraction
[tex]\frac{g(x)}{f(x)}=\frac{x^2-5}{4x+1}\text{ , x}\ne\frac{-1}{4}[/tex]In any algebraic fraction, denominators can not be zero, so we avoid any values make it equal to zero like -1/4 in our question
.Jeremy needs to mail five Christmas packages to his family. The first two weigh 3 pounds each and theother three weigh 2 pounds each. If two-day shipping costs $0.37 per ounce and ground shippingcosts $0.30 per ounce, how much will he save by shipping all of his packages by ground rather thantwo-day?
Answers
We know that
• The first two weigh 3 pounds.
,• The other three weigh 2 pounds,.
,• Two-day shipping costs $0.37 per ounce.
,• Ground shipping costs $0.30 per ounce.
We also know that 1 pound is equal to 16 ounces.
So, the weights are
[tex]3\cdot16=48[/tex][tex]2\cdot16=32[/tex]So, the cost of each package of 48 ounces is
[tex]48\cdot0.37=17.76[/tex]Therefore, each 3 pounds package costs $17.76 with two-day shipping.
We repeat the process for the other packages.
[tex]32\cdot0.37=11.84[/tex]Therefore, each 2 pounds package costs $11.84 with two-day shipping. So, the total is
[tex]2(17.76)+3(11.84)=35.52+35.52=71.04[/tex]Sending all packages with two-day shipping costs $71.04.
We repeat all the process for ground shipping.
[tex]2\cdot48\cdot0.30=28.8[/tex][tex]3\cdot32\cdot0.30=28.8[/tex]Both services cost $28.8 each, so the total is $57.6.
IF we compare both services, we have
[tex]71.04-57.6=13.44[/tex]Therefore, he will save $13.44.