An economist was interested in studying the impact of the recession on dining out, including drive thru
Question:
a. Construct a 90% confidence interval for the difference in the mean weekly reduction in dining out spending levels for the two populations.
b. Using a 5% significance level, can you conclude that the average weekly spending reduction for all families of four with discretionary incomes between $300 and $400 per week is less than the average weekly spending reduction for all families of five with discretionary incomes between $300 and $400 per week?
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