10.1 Mean sd Known

# 10.1 Mean sd Known

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Unformatted text preview: er of purchases is 0.9180 for the 20-29 group and 1.0188 for the 30-39 group. Using α of .01, determine if there is a significant difference in the number of purchases by the 2 groups. Hypotheses: H0: μ20-29 – μ30-39 = 0 Ha: μ20-29 – μ30-39 ≠ 0 Example Hypothesis Tests The local stadium is conducting a study to determine if their new promotional campaign is changing food and beverage purchases. Whereas the 20-29 year old age group was purchasing more items from the concession than the 30-39 age group, the campaign was intended to level out the number of purchases. The data in Concession.xlsx shows the number of items purchased in samples of 50 from the two groups. Previous studies show the variance in the number of purchases is 0.9180 for the 20-29 group and 1.0188 for the 30-39 group. Using α of .01, determine if there is a significant difference in the number of purchases by the 2 groups. Hypotheses: H0: μ20-29 – μ30-39 = 0 Ha: μ20-29 – μ30-39 ≠ 0 Example Hypothesis Tests The local stadium is conducting a study to determine if their new promotional campaign is changing food and beverage purchases. Whereas the 20-29 year old age group was purchasing more items from the concession than the 30-39 age group, the campaign was intended to level out the number of purchases. The data in Concession.xlsx shows the number of items purchased in samples of 50 from the two groups. Previous studies show the variance in the number of purchases is 0.9180 for the 20...
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## This document was uploaded on 03/05/2014.

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