Limited access

Upgrade to access all content for this subject

A local coffee shop decided to start advertising on the radio.

The $12\text{ weeks}$ following a lengthy advertising campaign showed sales averaging $\$5{,}785.34$ per week with a standard deviation of $\$385.23$. This compares to an average of $\$5{,}355$ per week in sales before the advertising campaign.

Assuming conditions are met, does this data give convincing evidence that the advertising campaign helped?

A

No, not at any common alpha levels.

B

Yes, but at the alpha $10\%$ level only.

C

Yes, but at the alpha $5\%$ and $10\%$ levels only.

D

Yes, at the alpha $1\%$, $5\%$, and $10\%$ levels.

E

Yes, at the alpha = $1\%$ level, but not $5\%$ level.

Select an assignment template