A company tracks satisfaction scores based on customer feedback from Individual

Question

A company tracks satisfaction scores based on customer feedback from Individual stores on a scale of 0 to 100. The following data represent the customer scores from store 1 and store 2.
store 1:
90 87 93 75 88 96 90 82 95 97 78

store 2:
82 85 90 74 80 89 75 81 93 75

assume population standard deviations are equal but unknown and that the population is normally distributed. Test the hypothesis that there is no significant difference between the satisfaction scores of the two groups using Alpha = 0.10.

Please show work.

Explanation / Answer

Two-Sample T-Test and CI: Store 1, Store 2

Method

Equal variances are assumed for this analysis.

Descriptive Statistics

Estimation for Difference

Test

here p-value = 0.071 < 0.10 (alpha)

hence we reject the null hypothesis

and conclude that there is significant difference between the satisfaction scores of the two groups

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