a) Based on the sample, do we have some evidence to suggest that there is a difference of what is considered important between these two groups of customers? Explain. b) Assuming all conditions are met, construct a 99% confidence interval for the true differen between the two means. Use www.stapplet.com to do the calculations. c) Based on the confidence interval, do we have enough evidence to suggest that there is a difference of what is considered important between these two groups of customers? Explain
a) Based on the sample, do we have some evidence to suggest that there is a difference of what is considered important between these two groups of customers? Explain. b) Assuming all conditions are met, construct a 99% confidence interval for the true differen between the two means. Use www.stapplet.com to do the calculations. c) Based on the confidence interval, do we have enough evidence to suggest that there is a difference of what is considered important between these two groups of customers? Explain
Transcribed Image Text:Problem 3: As the Hispanic population in the United States has grown, businesses have tried to
understand what Hispanic like. One study interviewed a random sample of customers leaving a
bank. Customers were classified as Hispanic if they preferred to be interviewed in Spanish or
as Anglo if they preferred English. Each customer rated the importance of several aspects of
bank service on a 10-point scale. Here are the summary results.
Group
n
Sample mean
Sample SD
Anglo
92
6.37
0.60
Hispanic
86
5.91
0.93
a) Based on the sample, do we have some evidence to suggest that there is a difference of
what is considered important between these two groups of customers? Explain.
b) Assuming all conditions are met, construct a 99% confidence interval for the true difference
between the two means. Use www.stapplet.com to do the calculations.
c) Based on the confidence interval, do we have enough evidence to suggest that there is a
difference of what is considered important between these two groups of customers? Explain.
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