Example 19.7 Suppose that three groups of salesmen (being employees of a company) underwent train-ing. The method of training used was different for each group. When training was completed, thesalesmen were given a test. The marks scored by them are shown below:758368859061Training method ATraining method B62706782808764Training method C6571746389We have to use the Kruskal-Wallis Test to find out whether there was difference in the effectivenessof the three training methods.

Answered: Image /qna-images/answer/34ad511f-19ed-47c9-a261-ec75797e1183.jpg

Answered: Example 19.7 Suppose that three groups…

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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A marketing firm is doing research for an Internet-based company. It wants to appeal to the age group of people who spend the most money online. The company wants to know if there is a difference in the mean amount of money people spend per month on Internet purchases depending on their age bracket. The marketing firm looked at two age groups, 1818-2424 years and 2525-3030 years, and collected the data shown in the following table. Let Population 1 be the amount of money spent per month on Internet purchases by people in the 1818-2424 age bracket and Population 2 be the amount of money spent per month on Internet purchases by people in the 2525-3030 age bracket. Assume that the population variances are not the same. Internet Spending per Month 1818-2424 Years 2525-3030 Years Mean Amount Spent 62.4962.49 62.8462.84 Standard Deviation 20.0420.04 15.6415.64 Sample Size 1616 2828 Step 1 of 2 : Construct a 95%95% confidence interval for the true difference…

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