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Exercise 3 An employment counselor found that in a sample of 100 unemployed workers, 65% were not interested in returning to work. Find the 95% confidence interval of the true proportion of workers who do not wish to return to work.

Exercise 3 An employment counselor found that in a sample of 100 unemployed workers, 65% were not interested in returning to work. Find the 95% confidence interval of the true proportion of workers who do not wish to return to work.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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Exercise 3 An employment counselor found that in a sample of 100 unemployed workers, 65% were not interested in returning to work. Find the 95% confidence interval of the true proportion of workers who do not wish to return to work. Exercise 4 The sugar content (in grams) for a random sample of 4-ounce containers of applesauce is shown below. Find the 99% confidence interval for (a) the population variance and standard deviation and (b) the population mean. Assume the variable is normally distributed. 18.6 19.5 20.2 20.4 19.3 21.0 20.3 19.6 20.7 18.9 22.1 19.7 20.8 18.9 20.7 21.6 19.5 20.1 20.3 19.9
Transcribed Image Text:Exercise 3 An employment counselor found that in a sample of 100 unemployed workers, 65% were not interested in returning to work. Find the 95% confidence interval of the true proportion of workers who do not wish to return to work. Exercise 4 The sugar content (in grams) for a random sample of 4-ounce containers of applesauce is shown below. Find the 99% confidence interval for (a) the population variance and standard deviation and (b) the population mean. Assume the variable is normally distributed. 18.6 19.5 20.2 20.4 19.3 21.0 20.3 19.6 20.7 18.9 22.1 19.7 20.8 18.9 20.7 21.6 19.5 20.1 20.3 19.9
NAME: Calculator Homework #7 – Confidence Intervals Use the calculator to determine the confidence intervals for the following. Exercise 1 A random sample of 49 shoppers showed that they spend an average of $23.45 per visit at Barnes and Nobles Book store. The standard deviation of the population is $2.80. Find the 90% confidence interval of the true mean. Exercise 2 The daily salaries of substitute teachers for 8 local school districts are shown below. Find the 95% confidence interval for the mean of the salaries. $60 $56 $60 $55 $70 $55 $60 $55
Transcribed Image Text:NAME: Calculator Homework #7 – Confidence Intervals Use the calculator to determine the confidence intervals for the following. Exercise 1 A random sample of 49 shoppers showed that they spend an average of $23.45 per visit at Barnes and Nobles Book store. The standard deviation of the population is $2.80. Find the 90% confidence interval of the true mean. Exercise 2 The daily salaries of substitute teachers for 8 local school districts are shown below. Find the 95% confidence interval for the mean of the salaries. $60 $56 $60 $55 $70 $55 $60 $55
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