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 probability that a sample mean would exceed 20 hours per week?

A) 1.0
B) 0.5
C) 1.96
D) Cannot be calculated based on the given information.