Business Statistics

Chapter 11 | Statistical Inference: Hypothesis Testing for Two Populations 371

A market is controlled by two leading companies—A and B. Company A

is concerned that a sizeable number of its customers may shift to Com-

pany B because of an aggressive advertisement campaign launched by

it. In order to assess the anticipated brand shift, the researchers at Com-

pany A have prepared a questionnaire to measure customer satisfaction

and have administered it to customers. The questionnaire consisted of 10

questions on a ve-point rating scale with 1 rated as “strongly disagree”

and 5 rated as “strongly agree.” The questionnaire has been administered ...