A Group of Statistics Students Decided to Conduct a Survey

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