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WITCHER [35]
3 years ago
10

Number 3 i need the answer

Mathematics
1 answer:
lubasha [3.4K]3 years ago
6 0
Explain so people know what number 3 is
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Denise is a professional swimmer who trains, in part, by running. she would like to estimate the average number of miles she run
SSSSS [86.1K]
Given:
n = 20, sample size
xbar = 17.5, sample mean
s = 3.8, sample standard deiation
99% confidence interval

The degrees of freedom is 
df = n-1 = 19

We do not know the population standard deviation, so we should determine t* that corresponds to df = 19.
From a one-tailed distribution, 99% CI means using a p-value of 0.005.
Obtain
t* = 2.8609.

The 99% confidence interval is
xbar +/- t*(s/√n)

t*(s/√n) = 2.8609*(3.8/√20) = 2.4309
The 99% confidence interval is
(17.5 - 2.4309, 17.5 + 2.4309) = (15.069, 19.931)

Answer: The 99% confidence interval is (15.07, 19.93)
4 0
3 years ago
Can u answer number 10?
KonstantinChe [14]
5.7(0.59)= B
2.8(1.99)= A
8 0
3 years ago
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fenix001 [56]

Answer:

a

Step-by-step explanation:

4 0
3 years ago
Help if you can, thanks.
Leya [2.2K]

Answer:

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Step-by-step explanation:

7 0
2 years ago
Which of the following best describes the movement of an object
Ainat [17]
There is no following, however


Motion, best describes the movement of an object.

Hope this helps!
4 0
3 years ago
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