=) A random sample of 2 nute and a standard devi terval for the population ou may use the table give

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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9.29
31-9403-abf9e2add3f5/pages/abed62d6372492877c71244e82d2fb9cae5fd01ab?location=%7B"id"%3A... û
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9.29 Men's Pulse Rates (Example 10) A random sample of 25 men's resting pulse rates
shows a mean of 72 beats per minute and a standard deviation of 13.
a. Find a 95% confidence interval for the population mean pulse rate for men, and
report it in a sentence. You may use the table given for Exercise 9.250.
b. Find a 99% confidence interval.
9.30
Chapter 9: Section Exercises
9.31
AP
c. Which interval is wider, and why?
Travel Time to School A random sample of 50 12th-grade students was asked how long
it took to get to school. The sample mean was 16.2 minutes, and the sample standard
deviation was 12.3 minutes. (Source: AMSTAT Census at School)
a. Find a 95% confidence interval for the population mean time it takes 12th-grade
students to get to school.
b. Would a 90% confidence interval based on this sample data be wider or
narrower than the 95% confidence interval? Explain. Check your answer by
constructing a 90% confidence interval and comparing this width of the interval
with the width of the 95% confidence interval you found in part a.
RBIS (Example 110) A random sample of 25 baseball players from the 2017 Major
Transcribed Image Text:31-9403-abf9e2add3f5/pages/abed62d6372492877c71244e82d2fb9cae5fd01ab?location=%7B"id"%3A... û ☆ ear tion red.... 9.29 Men's Pulse Rates (Example 10) A random sample of 25 men's resting pulse rates shows a mean of 72 beats per minute and a standard deviation of 13. a. Find a 95% confidence interval for the population mean pulse rate for men, and report it in a sentence. You may use the table given for Exercise 9.250. b. Find a 99% confidence interval. 9.30 Chapter 9: Section Exercises 9.31 AP c. Which interval is wider, and why? Travel Time to School A random sample of 50 12th-grade students was asked how long it took to get to school. The sample mean was 16.2 minutes, and the sample standard deviation was 12.3 minutes. (Source: AMSTAT Census at School) a. Find a 95% confidence interval for the population mean time it takes 12th-grade students to get to school. b. Would a 90% confidence interval based on this sample data be wider or narrower than the 95% confidence interval? Explain. Check your answer by constructing a 90% confidence interval and comparing this width of the interval with the width of the 95% confidence interval you found in part a. RBIS (Example 110) A random sample of 25 baseball players from the 2017 Major
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