In a Study of Factors Affecting Whether Soldiers Decide to Reenlist

Multiple Choice

In a study of factors affecting whether soldiers decide to reenlist, 320 subjects were measured for an index of satisfaction. The sample mean is 28.8 and the sample standard deviation is 7.3. Use the given sample data to construct the 98 percent confidence interval for the population mean for level of satisfaction.

A) [27.85, 29.75]
B) [27.96, 29.64]
C) [11.82, 45.78]
D) [28.75, 28.85]
E) [28.60, 29.00]