A Random Sample of 30 Students Spent an Average Amount

Multiple Choice

A random sample of 30 students spent an average amount of $40.00 on a date, with a standard deviation of $5.00. The standard error of the sample mean is 0.913. Calculate an approximate 95% confidence interval for the average amount spent by all students on a date.

A) (40.00, 90.00)
B) (79.10, 80.90)
C) (78.20, 81.80)
D) None of the above