A market analyst wants to know if the new website he designed is showing increas

Question

A market analyst wants to know if the new website he designed is showing increased page views per visit. A customer is randomly sent to one of two different websites, offering the same products, but with different designs. The data is shown in the table to the right. Complete parts a through c below. a) Find the estimated mean difference, y_1 - y_2, in page visits between the two websites. The estimated mean age difference between the two websites is .2 pages. (Type an integer or a decimal.) b) Find the standard error of the estimated mean difference. SEE (y_1 - y_2) = pages (Round to two decimal places as needed.)

Explanation / Answer

s1 = 4.1 , s2 = 4.3 , n1 = 85 , n2 = 90

SE = sqrt ( s1^2 / n1 + s2^2 / n2)

= sqrt ( 4.1^2/ 85 + 4.3^2 / 90)

= 0.6349

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