A random sample of 16 graduates of a certain secretarial school typed an average of 81.3 words per minute with a standard deviation of 7.2 words per minute. Assuming a normal distribution for the number of words typed per minute, find a 90% confidence interval for the average number of words typed by all graduates of this school. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. The confidence interval is<μ<. (Round to two decimal places as needed.)
A random sample of 16 graduates of a certain secretarial school typed an average of 81.3 words per minute with a standard deviation of 7.2 words per minute. Assuming a normal distribution for the number of words typed per minute, find a 90% confidence interval for the average number of words typed by all graduates of this school. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. The confidence interval is<μ<. (Round to two decimal places as needed.)
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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Transcribed Image Text:A random sample of 16 graduates of a certain secretarial school typed an average of 81.3 words per minute with a standard deviation of 7.2 words per minute.
Assuming a normal distribution for the number of words typed per minute, find a 90% confidence interval for the average number of words typed by all graduates of
this school.
Click here to view page 1 of the standard normal distribution table.
Click here to view page 2 of the standard normal distribution table.
Click here to view page 1 of the table of critical values of the t-distribution.
Click here to view page 2 of the table of critical values of the t-distribution.
The confidence interval is |<µ<
(Round to two decimal places as needed.)
C
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