Author Question: A report on spending by adults on recreation stated the following: At least 75 percent of the people ... (Read 106 times)

captainjonesify · **on:** Jun 24, 2018

A report on spending by adults on recreation stated the following: At least 75 percent of the people in the survey spend between 750 and 1,250 per year. The report also said that at least 88 percent spend between 625 and 1,375 per year.

Given this information, which of the following is most apt to be true?A) The standard deviation is approximately 125.
B) The distribution of spending on recreation can be assumed to be bell-shaped.
C) The standard deviation is approximately 187.5.
D) The standard deviation is approximately 250.

Question 2

In determining the required sample size in an application involving an estimate for the population mean, if the population standard deviation is known, there is no compelling reason to select a pilot sample.

Indicate whether the statement is true or false