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3. A retail company is interested in examining whether the time taken for it to obtain approval for a credit card number by phone varies from one day of the week to another. The manager collects the following results. On Mondays, a sample of nį = 20 cases had a sample average of x1. = 20.44 seconds with a sample standard deviation of s1 =1.338 seconds. On Wednesdays, a sample of n2= 15 cases had a sample average of x2. = 16.33 seconds with a sample standard deviation of s2 = 1.267 seconds, and on Fridays, a sample of n3 seconds with a sample standard deviation of S3 = 1.209 seconds. a) Set up the Ho and Ha hypothesis b) Find out the F statistic c) Decide the p-value is above 0.05, between 0.01 and 0.05, or below 0.01. d) At the significant level of 0.01, what should the manager conclude? = 18 cases had a sample average of x3.= 15.34

3. A retail company is interested in examining whether the time taken for it to obtain approval for a credit card number by phone varies from one day of the week to another. The manager collects the following results. On Mondays, a sample of nį = 20 cases had a sample average of x1. = 20.44 seconds with a sample standard deviation of s1 =1.338 seconds. On Wednesdays, a sample of n2= 15 cases had a sample average of x2. = 16.33 seconds with a sample standard deviation of s2 = 1.267 seconds, and on Fridays, a sample of n3 seconds with a sample standard deviation of S3 = 1.209 seconds. a) Set up the Ho and Ha hypothesis b) Find out the F statistic c) Decide the p-value is above 0.05, between 0.01 and 0.05, or below 0.01. d) At the significant level of 0.01, what should the manager conclude? = 18 cases had a sample average of x3.= 15.34

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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3. A retail company is interested in examining whether the time taken for it to obtain approval for a credit card number by phone varies from one day of the week to another. The manager collects the following results. On Mondays, a sample of ni = 20 cases had a sample average of x1. = 20.44 seconds with a sample standard deviation of s1 = 1.338 seconds. On Wednesdays, a sample of n2= 15 cases had a sample average of x2. = 16.33 seconds with a sample standard deviation of s2 1.267 seconds, and on Fridays, a sample of n3 seconds with a sample standard deviation of s3 = 1.209 seconds. a) Set up the Ho and Ha hypothesis b) Find out the F statistic c) Decide the p-value is above 0.05, between 0.01 and 0.05, or below 0.01. d) At the significant level of 0.01, what should the manager conclude? 18 cases had a sample average of x3.= 15.34
Transcribed Image Text:3. A retail company is interested in examining whether the time taken for it to obtain approval for a credit card number by phone varies from one day of the week to another. The manager collects the following results. On Mondays, a sample of ni = 20 cases had a sample average of x1. = 20.44 seconds with a sample standard deviation of s1 = 1.338 seconds. On Wednesdays, a sample of n2= 15 cases had a sample average of x2. = 16.33 seconds with a sample standard deviation of s2 1.267 seconds, and on Fridays, a sample of n3 seconds with a sample standard deviation of s3 = 1.209 seconds. a) Set up the Ho and Ha hypothesis b) Find out the F statistic c) Decide the p-value is above 0.05, between 0.01 and 0.05, or below 0.01. d) At the significant level of 0.01, what should the manager conclude? 18 cases had a sample average of x3.= 15.34
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