The mean score on the exit examination for an urban high school is 63 with a standard deviation of 9. What is the standard deviation of the distribution of sample means with a sample size of 9?
A. 2
B. 3
C. 4
D. 4.1
answer B
A. 2
B. 3
C. 4
D. 4.1
answer B
3 answers
1 answer
1 answer
1 answer