A Researcher Takes a Very Large,nationwide Random Sample of 7th

Question 93

Multiple Choice

A researcher takes a very large,nationwide random sample of 7th grade students and computes a mean verbal ability score of 85.50 with a standard deviation of 8.35.From this information,she computes a standard error of the mean of 2.64.What are the upper and lower limits of the 95% confidence interval for the mean?
A)69.13 to 101.87
B)77.15 to 93.85
C)80.33 to 90.67
D)82.86 to 88.14