A national freight delivery service is considering introducing a same-day delivery service at no extracost. It randomly selected customers in its business areas and recorded the customer satisfactionscores. The score range is between 1-100, where 100 is the highest customer satisfaction.Define X1 as the satisfaction score with ordinary deliveries and X2 as the satisfaction score for thesame customers with same day deliveries. Some summary statistics are given asThe sample mean of X1 isThe sample variance of X1 isThe sample mean of X2 isThe sample variance of X2 isThe sample covariance betweenX1 and X2 isThe sample size is44.20142.7553.86103.3981.4356 Carry out a test to investigate whether the new delivery scheduling has improved customersatisfaction.Specifically, you must(a) define any new notation,(b) briefly justify your testing procedure,(c) state the hypotheses,(d) calculate the test statistic and show your calculation steps,(e) use both critical value and p-value approach,(f) make a decision for the test and briefly explain.HINT: Var(A-B)=Var(A)+Var(B)-2* Cov(A,B)

Here X1 and X2 are the random variables that denote the satisfaction score for ordinary deliveries…

Answered: Carry out a test to investigate whether…

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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