Answered: 7) An advertising executive is…

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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Question

7) An advertising executive is interested in evaluating the effectiveness of internet advertising. The executive plans to evaluate the effectiveness by selecting retail stores that did not advertise on the internet last year but did so this year. The executive will then obtain the annual sales for the retail outlets for each of the two years.

a) State the Hypothesis to determine if internet advertising increased sales, on the average, for stores?

b) The data below contains the annual sales (in thousands of dollars) for each of the 40 stores in both years. Collect data and calculate necessary statistics to test the hypothesis.

c) Using alpha = 0.05, draw a conclusion for the hypothesis test. State the conclusion in the context of the problem.

This-Year	Last-Year
189	151
225	224
106	30
146	132
234	233
233	213
210	197
107	81
213	209
174	165
209	208
237	251
190	144
159	154
176	160
145	96
294	257
141	81
197	166
156	170
167	257
224	231
250	195
210	221
257	211
197	183
203	180
190	127
202	170
191	177
249	236
196	154
183	143
192	168
217	154
104	102
275	242
137	82
128	148
159	179