A company wanted to test which of its six different sales letters was the most e

Question

A company wanted to test which of its six different sales letters was the most effective in making sales. The company randomly assigned its prospective customers to one of s groups, and each group received a different sales letter. Each sales letter either resulted in a sale or no sale. One of the six sales letters produced 50% more sales than the next best performing sales letter. What conclusion can be drawn from this study? Conclusions cannot be made because there was not a control group. There is clear evidence of an association between the sales letters and sales, but it cannot be said there is a causal relationship between the sales letters and sales. There is a causal relationship between the sales letters and sales. Conclusions cannot be made because the lurking variable of the customer's Income is confounded with the sales letters.

Explanation / Answer

A company wanted to test which of their six different sales letters was the most effective in making sales. The company randomly assigned their prospective customers to one of six groups , where each group received a different sales letter. Each sales either resulted in a sale or no sale.

One of the six sales letter produced 50% more sales than the next best performing sales letter.

What conclusion can be drawn from this study?

A. Conclusions cannot be made because there was not a control group
B. Conclusions cannot be made because the lurking variable of the customers income is confounded with the sales letter
C. There is a causal relationship between the saws letter and sales
D. There is clear evidence of an association between the sales letter and sales, but it cannot be said there is a causal relationship between the sales letters and sales

Ans:Conclusions cannot be made because the lurking variable of the customers income is confounded with the sales letter (option B is correct)

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