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

Question

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 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
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

Explanation / Answer

Option D seems to be correct.

Option B does not seem to be correct because company send letters to its prospective customers. So it can be assumed that they are able to buy the products.

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