Select the correct answer. Mike wants to find the confidence interval for a set of data. He knows the sample size and the sample proportion. Which other plece of
Information does he need to determine the confidence interval?
OA
the number of favorable responses
ОВ.
the standard error of the mean
OC. the standard deviation
OD. the critical value

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?