Sleep habits of New Yorkers. New York is known as the city that never sleeps". A random sample of 25 New Yorkers were asked how much sleep they get per night. Statistical summaries of these data are shown below. The point estimate suggests New Yorkers sleep less than 8 hours a night on average. Is the result statistically signicant? n x s min max25 7.73 0.77 6.17 9.78(a) Write the hypotheses in symbols and in words.(b) Check conditions, then calculate the test statistic, T, and the associated degrees of freedom.(c) Find and interpret the p-value in this context. Drawing a picture may be helpful.(d) What is the conclusion of the hypothesis test?(e) If you were to construct a 90% condence interval that corresponded to this hypothesis test, would you expect 8 hours to be in the interval?
Answers
Step-by-step explanation:
1.
the null hypothesis:
H0: u = 8 hours ( new Yorkers sleep for 8 hours)
The alternate hypothesis;
H1: u ≠ 8 hours ( new Yorkers sleep less than 8 hours)
b.
test statistic
t = (barX - u)/s/√n
= 7.73-8/0.77/√25
= -1.7532
degree of freedom = n-1
= 25-1 = 24
c.
p(value)
= p(t < -1.7532)
= 0.046
obviously we can see that the p value is less than 0.05 alpha level so we reject the null hypothesis.
d
The data gives strong evidence that new Yorkers sleep less than 8 hours on average every night.
e.
at 90% level of confidence
we have
7.73-0.26334, 7.73+0.26334
= 7.466, 7.993
please check attachment
thank you!
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Answer:
subtracting 5 from both sides
Step-by-step explanation:
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Answer:
p>-18
Step-by-step explanation:
The most efficient way to find the solution of p+5>-13 is to subtract 5 from both sides, getting p>-18
Solve for y
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Step-by-step explanation:
y + 2 = -2x - 4
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Becky read 10 books in 4 days.Sarah reads 50 books in 20 days. Are the two girls reading at the same rate
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10 x 5 = 50
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They both have equal multiples.
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Answer:
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Step-by-step explanation:
Answer:
your answer is 220 :)
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Answer:
a. pi
Step-by-step explanation:
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Answers
Answer:
m = undef
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDASAlgebra I
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Step 1: Define
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Point (3, 6)
Step 2: Find slope m
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Must show all work to receive credit! Show your work in the box below.
Answers
Answer:
9x-3
Step-by-step explanation:
2x2=4
4+4x-3
4x-1
5x-2
Add them together
4x-1+5x-2= 9x-3
In the diagram below, triangle A is similar to triangle B. What is the value of n?
In the diagram below, triangle A is similar to triangle B. What is the value of n?
Answers
Answer:
n = 2
Step-by-step explanation:
Since ∆A is similar to ∆B, therefore, the ratio of their corresponding sides would be equal.
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A librarian sorts 500 books at a constant rate. After 6 days, the librarian still has 200 books to sort. How much time does it take to sort the books from start to finish?
Answers
Answer: 10 days
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What is Unitary method ?In order to solve a problem for two different values of a quantity, its unit value is first derived. This method is known as unitary method.
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= 50
Now, number of days the remaining number of books to be read is,
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Hence, it will take 10 days from the start to finish all the books.
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Answer:
Two equivalent ratios are: 4:5 and 48/60.
Step-by-step explanation:
Well, you can divide on the first one, and multiply on the second one. Hope it helps!
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Answer:
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Step-by-step explanation:
Answer:
7/10
Step-by-step explanation:
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Answer:
Let the price of one book be Rs. x
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(85x)/ 100 - (1040 - x × 136) / 100
85 x= 1040 x 136 - 136 x
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221 x = 1040 x 136
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X = 640
So, Cost price for 1st book is 640 Rs. and 2nd book is 1040 - 640 = 400 Rs.
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Answer:
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Answer:
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FIANCE 50 HELP ASAP
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Answer:
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Answers
Answer:
A = π(14t)²
Step-by-step explanation:
The radius is increasing at the rate of 14 cm per second.
We need to find the formula for the area A of the circle as the function of time t.
Initial area of the circle,
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An 8-foot piece of twine costs $5.76. What is the price per inch?
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Answer:
$0.06
Step-by-step explanation:
First, find how many inches are in 8 feet.
Since 1 foot is 12 inches, multiply 8 by 12:
8(12)
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Answer:
$0.06
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There are 12 inches in a foot, and there are 8 feet all together, meaning there is 96 inches for $5.76.
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Answer:
No
Step-by-step explanation:
the graph fails the vertical line test
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Answers
Answer:
I believe its $250.80
Step-by-step explanation:
Because 20% of 1254 is 250.8
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d) 0.1125
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If you have a graphing calculator, go to 2nd vars, normalcdf(.
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Your answer will be .266
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Answer:
1056 = 11 x 3.2 x 3
Step-by-step explanation:
Find hyptoenuse
Round the answer to the nearest hundredth.
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Answer:
11.10
Step-by-step explanation:
√123.3 = 11.10405
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11.10405 → 11.10
Best of Luck!
Ruth's credit card has an APR of 10,91%, and it computes finance charges using the previous balance method on a
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a $890.91
b. $797.22
C.$796.87
d. $804.47
Please select the best answer from the choices provided
Answers
Answer:
It's B trust
Step-by-step explanation:
The required balance at the beginning of April is $796.87. Option C is correct.
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She made a $88.34 purchase on April 17th
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Solving for B, we get:
B = $796.87
So, the answer is C. $796.87.
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MArking people as BRAINLIST only answer if you know
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Answer:
Quad 4!
Hope I helped!
~PumpkinSPice1
Which of the following equations has a slope of -3 and a y-intercept of 8? *
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Answer:
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Step-by-step explanation:
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a) 1
b) 2
c)-1
d) 3
e) 4
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c) -3
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y=3 and x= 5
Step-by-step explanation:
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