In a sample of 374 adults, the average weekly salary was $746 with a population standard deviation of $54.21. Do not use the dollar sign for any of your answers. a.) What is the best point estimate of the mean salary for adults? b.) What is the positive critical value that corresponds to a 93% confidence interval for this situation? (round to the nearest hundredth) Za/2 c.) What is the 93% confidence interval estimate of the mean salary for all adults? (round to the nearest whole number) << d.) Does the interval suggest that the mean salary of all adults is less than $745? Oyes Ono Check