Do consumers spend more on a trip to Target compared to Walmart? Suppose researchers interested in this question collected a random sample from 80 Target customers and 85 Walmart customers by asking customers for their purchase amount as they left the stores. The 80 Target customers have the mean purchase amount $53 and the standard deviation $19. The 85 Walmart customers have the mean purchase amount $45 and the standard deviation $21. (a) Is the data collected from independent samples or dependent samples? (b)  Is the relevant test statistic z-stat or t-stat?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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Do consumers spend more on a trip to Target compared to Walmart? Suppose researchers interested in this question collected a random sample from 80 Target customers and 85 Walmart customers by asking customers for their purchase amount as they left the stores. The 80 Target customers have the mean purchase amount $53 and the standard deviation $19. The 85 Walmart customers have the mean purchase amount $45 and the standard deviation $21.

(a) Is the data collected from independent samples or dependent samples?

(b)  Is the relevant test statistic z-stat or t-stat?

Expert Solution
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The objective is to specify, if the considered samples are dependent or independent in nature, and which of the given test statistic is appropriate for validating the claim related to customers' spending at Target and Walmart.

 

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