Among a Sample of 100 Students Selected at Random from One

Among a sample of 100 students selected at random from one college,the mean number of siblings is 1.4 with a standard deviation of 1.3.Find a 95% confidence interval for the mean number of siblings for all students at this college.

A) (1.08,1.73)
B) (1.36,1.44)
C) (61.8,66.2)
D) (0.95,1.45)
E) (1.24,1.44)