A marketing company wants to know the impact of its advertising campaign on the market. We measure

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A marketing company wants to know the impact of its advertising campaign on the market. We measure the intention to buy (on a scale of 1 to 10) among 5 customers in a discussion group before and after viewing the campaign.

Before: 6 3 5 7 4

After: 9 7 8 6 6.

a. Formulate the null hypothesis associated with this problem.

b. Calculate the observed t by demonstrating your calculation in detail.

c. Determine the critical t according to a two-sided threshold of 5% and formulate a conclusion to the problem posed.

d. We must always mention the "degrees of freedom" with the observed t; yet, we did not have this additional task during the tests using the distribution z-scores. Why do we have to indicate the degrees of freedom with the t?

Posted Date: May 19, 2024 02:06 PM

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A marketing company wants to know the impact of its advertising campaign on the market. We measure

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