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Please help on Exercise 2

Please help on Exercise 2

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Please help on Exercise 2 and 4

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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