ple of size 12=31 has sample mean = 53 and sample standard deviation 5 = 8.1. t: 0/2 1 of 2 Construct a 95% confidence interval for the population mean . Enter the values for the lower and upper limits and the mean to graph. Round the swers to one decimal place. -5.0 45.0 95% confidence interval 54.5 64.0 64.0 K

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A sample of size n = 31 has sample mean x = 53 and sample standard deviation 5 = 8.1.
Part: 0/2
Part 1 of 2
(a) Construct a 95% confidence interval for the population mean μ. Enter the values for the lower and upper limits and the mean to graph. Round the
answers to one decimal place.
45.0
45.0
95% confidence interval
54.5
64.0
64.0
›
B
199
Transcribed Image Text:A sample of size n = 31 has sample mean x = 53 and sample standard deviation 5 = 8.1. Part: 0/2 Part 1 of 2 (a) Construct a 95% confidence interval for the population mean μ. Enter the values for the lower and upper limits and the mean to graph. Round the answers to one decimal place. 45.0 45.0 95% confidence interval 54.5 64.0 64.0 › B 199
Fake Twitter followers: Many celebrities and public figures have Twitter accounts with large numbers of followers. However, some of these followers are fake,
resulting from accounts generated by spamming computers. In a sample of 48 twitter audits, the mean percentage of fake followers was 13.6 with a standard
deviation of 9.2.
Part: 0 / 2
Part 1 of 2
(a) Construct a 98% confidence interval for the mean percentage of fake Twitter followers. Round the answers to at least one decimal place.
A 98% confidence interval for the mean percentage of fake Twitter followers is
<F<
X
KI
Transcribed Image Text:Fake Twitter followers: Many celebrities and public figures have Twitter accounts with large numbers of followers. However, some of these followers are fake, resulting from accounts generated by spamming computers. In a sample of 48 twitter audits, the mean percentage of fake followers was 13.6 with a standard deviation of 9.2. Part: 0 / 2 Part 1 of 2 (a) Construct a 98% confidence interval for the mean percentage of fake Twitter followers. Round the answers to at least one decimal place. A 98% confidence interval for the mean percentage of fake Twitter followers is <F< X KI
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