Asked by Steph
28. 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) 1.96
B) 0.5
C) Cannot be calculated based on the given information.
D) 1.0
A) 1.96
B) 0.5
C) Cannot be calculated based on the given information.
D) 1.0
Answers
Answered by
PsyDAG
If it is a normal distribution, mean = median = mode.
Look at your definition of median.
Look at your definition of median.