Question: A school district is considering implementing a program that claims it will significantly raise the math scores of 4th graders. The current 4th grade math

A school district is considering implementing a program that claims it will significantly raise the math scores of 4th graders. The current 4th grade math scores for the district are normally distributed with a mean of 30 and a standard deviation of 10. The administrators decide to test the new program in one school with 120 4th graders; at the end of the program, the average math score is 33 What is the standard deviation of the comparison distribution

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