In a Simple Random Sample of 100 Women from Richmond

Multiple Choice

In a simple random sample of 100 women from Richmond, Virginia, the average amount of money that these women spent per visit at their hair salons is $32.43. The standard deviation from this sample is $7.84.
Which of these is an approximate 95% confidence interval for the mean amount of money that all women in Richmond spend per visit at their hair salons?

A) $32.43 ± $0.784
B) $32.43 ± $1.568
C) $32.43 ± $7.84
D) $7.84 ± $3.243
E) $7.84 ± $6.486