Answer:
the cost of each gallons is 8÷22.00=$36A random sample of 50 students at a large high school resulted in a 95 percent confidence interval for the mean number of hours of sleep per day of (6.73, 7.67). Which of the following statements best summarizes the meaning of this confidence interval?
A . About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the population mean number of hours of sleep per day.
B. 95% of the students in the survey reported sleeping between 6.73 and 7.67 hours per day.
C. 95% of the students in this high school sleep between 6.73 and 7.67 hours per day.
D. A student selected at random from this population sleeps between 6.73 and 7.67 hours per day for 95% of the time.
Answer:
A . About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the population mean number of hours of sleep per day.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
In this question:
95% CI from a sample of 50 students is (6.73, 7.67).
This means that we are 95% sure that the population mean is in this interval, that is, about 95% samples of 50 would contain the population mean, which is given by option A.
By using basic definition of confidence interval we can say that option A " About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the population mean number of hours of sleep per day." is correct.
What is confidence interval ?confidence interval tells us the degree of certainty or uncertainty that is existent in a sampling method. It gives us a range of values, telling us we are fairly sure that our true value or parameter lies within the range.
Here given that 95% confidence interval from a sample of 50 students is (6.73,7.67). so we can say that there are 95% chance that the population mean is in this interval (6.73,7.67) , that is, about 95% samples of 50 would contain the population mean, so option A is correct
By using basic definition of confidence interval we can say that option A " About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the population mean number of hours of sleep per day." is correct.
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please help me with this question
how do you make like terms? thank you
Answer:
Like terms are terms whose variables are the same. In other words, terms that are "like" each other. For example, 2x and 3x are like terms. Furthermore, 3y² and 4y² are also like terms. If two factors are like terms they can be combined.
Step-by-step explanation:
Hope this helps!
Answer:
Step-by-step explanation:
Sophie Ruth está comiendo una barra de chocolate de 50 gramos que contiene. 30% de cacao
help please bdhsfhisbf
Help pls help pls help.
B. 448 square meters
Step-by-step explanation:
I cut it into two rectangles
12cm by 4 cm for the first rectangle = 48cm
22cm by 8 cm for the second = 176cm
add areas together = 224cm
convert to meters = 448 square meters
hope this helps comment for more
3/4 times 3/5 please show me how you did it so i can learn
Answer:
9/20
Step-by-step explanation:
You have to multiply both numerators and both denomenators!
3/4 x 3/5 = 9/20
3 x 3 = 9
4 x 5 = 20
therefore, your answer is 9/20!
Hope this helps, Have a nice day!
ABCD is a square. What is the measure of
Answer:
Step-by-step explanation:
Since it is a square, a line from one corner to the other cuts the right angles in half. this is only because it is a square, if you don't see why I can explain.
Since each right angle is cut in half each smaller angle on the corners is 45 degrees.
ABD is one of those cut in half angles, specifically from the right angle ABC. So it is 45 degrees
I seriously need help with this. I pay attention in class it's just so confusing!! I'm giving extra points. Now 15. Please tell the truth <3
Answer:
D
Step-by-step explanation:
Its D because A is all 90 degrees
Not C because all 90
What is the perimeter of the triangle?
Answer: 3y + 5 cm
Step-by-step explanation: The perimeter of a triangle
is just the distance around the outside of the figure.
So just add up all the sides.
So we have y + y + y + 5 and we get 3y + 5.
HOW DO YOU DO THIS PLEASE EXPLAIN
Answer:
70 degrees
Step-by-step explanation:
it’s a bit hard to explain
If a pizza pie had
a diameter of 12
inches, what
would be its
circumference?
Answer:
37.69
Step-by-step explanation:
Answer:r=7r =9 r=10
Step-by-step explanation:
A person places $13900 in an investment account earning an annual rate of 2.8%, compounded continuously. Using the formula V = Pe^{rt}V=Pe rt , where V is the value of the account in t years, P is the principal initially invested, e is the base of a natural logarithm, and r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 18 years.
Answer
hmm
Step-by-step explanation:
Answer:Can u explain more i odnt understand it pelase
Step-by-step explanation:
The value of Adam's model railway is $550.
This value increases exponentially at a rate of r %
per year.
At the end of 5 years the value will be $736.
Calculate the value of r.
Answer:(c)
Step-by-step explanation:
Given
The initial value of Adam's model is [tex]A_o=\$550[/tex]
the value increases exponentially with the rate of [tex]r\%[/tex]
Time period [tex]t=5\ years[/tex]
Final amount [tex]A=\$736[/tex]
Exponential growth is given by
[tex]\Rightarrow A=A_o(1+r)^t[/tex]
Putting values
[tex]\Rightarrow 736=550(1+r)^5\\\\\Rightarrow (1+r)^5=1.338[/tex]
[tex]\Rightarrow 1+r=1.05999\\\Rightarrow r=0.05999\ or\ 5.99\%\approx 6\%[/tex]
Option (c) is correct
A trapezoid has an area of 13.5 square inches. The bases are 3 inches and 6 inches. Solve to determine the height of the trapezoid.
h=blank in.
Answer:
h=3 in
Step-by-step explanation:
PLZ GIVE ME BRANELIST
each of four people shake hands once with each of the other three. how many hand shakes will there be
Answer:
6
Step-by-step explanation:
o o o o
3+2+1 = 6
Write an equation to show how the Distributive Property can help you solve each problem. 3 Kelly signed copies of her new book at a local bookstore. In the morning she signed 36 books, and in the afternoon she signed 51 books. It took her 5 minutes to sign a book. How much time did she spend signing books? Equation: Solution:
Answer:
wouldnt it be 8 im not sure tho
Step-by-step explanation:
Solve for x y-b=m(x-a)
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer:
I believe this question should be one solution
Step-by-step explanation:
Hope this Helped
How many feet are in half a mile?
Answer:
answer below:)
Step-by-step explanation:
There are 5280 feet in one mile. So, half a mile is equal to 0.5 x 5280 = 2640 feet.
Plzz help me
A.36
B.48
C.144
D.288
Answer:
D.288
Step-by-step explanation:
6×4×12
Multiply 6 and 4 to get 24.
24×12
Multiply 24 and 12 to get 288.
288
I need help with this
The relationship is “hours multiplied by
equals the number of dogs.”
Answer:
3
Step-by-step explanation:
Answer:
The relationship is “hours multiplied by
3
equals the number of dogs.”
Step-by-step explanation:
I need help doing this please
Step-by-step explanation:
what is the question asking
Madeline sells five roses on the first day, seven roses on the second day, ten on the third day, fourteen on the fourth day. If Madeline continues her selling pattern, how many roses will she sell on the tenth day? How many will she sell on the fifteenth day?
Answer:
124, I believe
Step-by-step explanation:
each day you're adding on the amount of the day,
5,7,10,14,19,25,32,40,49,59,70,82,95,109,124
days below
(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15)
5 on day 1
5+2=7 day 2
7+3=10 day 3
and so on
reflected over the x-axis, then translated 6
units left
Find the volume of a pyramid with a square base, where the perimeter of the base is 7.4 ft and the height of the pyramid is 8.1 ft. Round your answer to the nearest tenth of a cubic foot.
9514 1404 393
Answer:
9.2 ft³
Step-by-step explanation:
The side length of the square base is 1/4 of the perimeter, so is ...
s = P/4 = (7.4 ft)/4 = 1.85 ft
The area of the base is the square of this, or ...
A = s² = (1.85 ft)² = 3.4225 ft²
The volume of the pyramid is given by ...
V = 1/3Bh = (1/3)(3.4225 ft²)(8.1 ft) = 9.24075 ft²
The volume of the pyramid is about 9.2 cubic feet.
PLEASE HELP!!!! Parallelogram
Answer:
B) 120 degrees
Step-by-step explanation:
The two triangles are the same, so first find the measure of angle B.
To do this first solve for angles A and C. Solve for A first: 4x or 4(5), which is 20 degrees. Now solve for C: 8x or 8(5), which is 40 degrees. Add 40 + 20 degrees to get 60 degrees total of those two angles.
A triangle has 180 total degrees, so to solve for the measure of Angle B, subtract 180 - 60 to get 120 degrees.
Since the two triangles are the same, Angle D is the measure as Angle B.
Hope it helps!
can u answer this please
Answer:
Check pdf
Step-by-step explanation:
If g(x) is 11 then what is x