Use the Following Information for Questions

Use the following information for questions:
Exam scores for a large introductory statistics class follow an approximate normal distribution with an average score of 56 and a standard deviation of 5. The average exam score in your lab was 59.5. The 20 students in your lab sections will be considered a random sample of all students who take this class.
-What is the standard deviation of the distribution of the average exam score of the 20 students in your lab section?

A) 0.25
B) 1.12
C) 1.25
D) 5

Correct Answer:

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