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Ross Simons, a jewelry cataloguer, has tested two creatives for the cover of the spring 2018...

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Basic Math

Ross Simons, a jewelry cataloguer, has tested two creatives forthe cover of the spring 2018 catalogue. The themes were inspiredfor the birthstones of April and May. The timing of the drops forthe two executions was March 15, 2017. The results are shown belowand based on the number of orders from each test cell. The interestis in whether the cover, which is the only difference in the twocatalogues, can be associated with a difference in average ordersize.

CellNAverage Order $Stand. Dev. Order $
(April) Diamond480$187.78$27.93
(May) Emerald503$192.03$25.88

Construct a 95% confidence interval for the difference betweenthe average order size in dollars for each cell. Remember to thenfully interpret results including a recommendation for the businessdecision on the indicated strategy.

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