State whether each of the following changes would make a confidence interval wider or narrower. (Assume that nothing else changes.) a. Changing from a 99% confidence level to a 90% confidence level. b. Changing from a sample size of 30 to a sample size of 250 c. Changing from a standard deviation of 25 pounds to a standard deviation of 30 pods. a. How will changing from a 99% confidence level to a 90% Does confidence level affects the width of the confidence interval? How will changing from a sample size of 30 to a sample size of 250 affect the width of the confidence interval? Use a sample mean of 95, a sample standard deviation of 30, and a confidence level of 99%. Calculate the confidence interval using the values given in the previous step, and the original sample size, 25 The bounds have been rounded to three decimal places.
State whether each of the following changes would make a confidence interval wider or narrower. (Assume that nothing else changes.) a. Changing from a 99% confidence level to a 90% confidence level. b. Changing from a sample size of 30 to a sample size of 250 c. Changing from a standard deviation of 25 pounds to a standard deviation of 30 pods. a. How will changing from a 99% confidence level to a 90% Does confidence level affects the width of the confidence interval? How will changing from a sample size of 30 to a sample size of 250 affect the width of the confidence interval? Use a sample mean of 95, a sample standard deviation of 30, and a confidence level of 99%. Calculate the confidence interval using the values given in the previous step, and the original sample size, 25 The bounds have been rounded to three decimal places.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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State whether each of the following changes would make a confidence interval wider or narrower. (Assume that nothing else changes.)
a. Changing from a
99%
confidence level to a
90%
confidence level.b. Changing from a sample size of
30
to a sample size of
250
c. Changing from a standard deviation of
25
pounds to a standard deviation of
30
pods.a. How will changing from a
99%
confidence level to a
90%
Does confidence level affects the width of the confidence interval?How will changing from a sample size of
30
to a sample size of
250
affect the width of the confidence interval? Use a sample mean of 95, a sample standard deviation of 30, and a confidence level of 99%.Calculate the confidence interval using the values given in the previous step, and the original sample size,
25
The bounds have been rounded to three decimal places.Expert Solution
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