Question

In: Statistics and Probability

A company has collected its sales data of a certain product for 10 days before and...

A company has collected its sales data of a certain product for 10 days before and after an ad campaign was run. The sales numbers (in thousands) before and after the ad campaign are as follows: before [79, 65, 62, 61, 67, 73, 56, 74, 83, 69], after [65, 76, 75, 44, 71, 66, 57, 68, 78, 74]. The researchers do NOT believe that the underlying distributions are normal, and want to take the magnitude of the difference into account. Apply a suitable statistical test to see whether the campaign was useful. What are the correct test value and decision at a confidence level of 95%?

10.5, Not useful

33.5, Not useful

21.5, Useful

33.5, Useful

10.5, Useful

21.5, Not useful

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Expert Solution

orchestra answered 2 years ago
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