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    Starbucks 20-Minute Consumer Survey Statistical Analysis

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    A 20-minute consumer survey mailed to 500 adults aged 25-34 included a $5 Starbucks gift certificate. The same survey was mailed to 500 adults aged 25-34 without the gift certificate. There were 65 responses from the first group and 45 from the second group.

    (a) Perform a two tailed test comparing the response rate (proportions) at a = .05
    (b) Form a confidence interval for the difference of proportions, without pooling the sample. Does it includes zero?

    © BrainMass Inc. brainmass.com June 3, 2020, 9:36 pm ad1c9bdddf
    https://brainmass.com/business/business-management/starbucks-minute-consumer-survey-statistical-analysis-190613

    Solution Preview

    Please see the attached file.

    Hypotheses: H0: p1 = p2 vs. HA: p1 ≠ p2
    Level of Significance: a = 5%
    Decision Rule: Reject the null hypothesis if p-value < ...

    Solution Summary

    The solution examines a Starbucks consumers survey by using a two tailed test to compare the response rate.

    $2.19

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