The mean score on a biology exam taken by all undergraduate students in a college in a particular year is 67.8 with a standard deviation of 11.5. The standard error of the mean for a sample of 70 students is , and the margin of error of the mean is . (Round off your answers to the nearest hundredth.)

Question

harliii · Answer

Standard error = standard deviation/sqrt(sample size) = 11.5/sqrt(70) = 1.375
Margin of error = 67.8 + or - 1.375