A Group of Statistics Students Decided to Conduct a Survey

Multiple Choice

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
E) None of the choices are correct