A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spend studying per week. Based on a simple random sample, they surveyed 144 students. The statistics showed that students studied an average of 20 hours per week with a standard deviation of 10 hours. What is the standard error of the mean?
A) 0.83
B) 10
C) 0.5
D) 2

Question

Quizplus · Accepted Answer

The standard error of the mean is calculated by dividing the standard deviation by the square root of the sample size. In this case, the standard deviation is 10 hours and the sample size is 144 students. Therefore, the standard error of the mean is 10 / sqrt(144) = 0.83 hours.

A Group of Statistics Students Decided to Conduct a Survey