According to a research institution, the average hotel price in a certain year was $91.99. Assume the population standard deviation is $25.00 and that a random sample of 50 hotels was selected. Complete parts a through d below. a. Calculate the standard error of the mean. 6- = $ 3.54 (Round to two decimal places as needed.) b. What is the probability that the sample mean will be less than $93? P (x