Exhibit 16

Multiple Choice

Exhibit 16.2 A researcher wishes to estimate the average annual expenditures per household on gasoline.The estimate must be accurate within plus or minus $50 and the estimated standard deviation for such expenditures is $400.
Refer to Exhibit 16.2.Given estimates and specifications that the population standard deviation is $200,TOTAL precision is $100 and the researcher wishes to be 95% confident in the result,the required sample size is

A) 42.
B) 32.
C) 16.
D) 64.
E) Not enough information given.