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# College students in a large psychology class take a final exam. The mean exam score is 85, and the standard deviation is 5.Instruction: Using the formula for σM, what will the standard error of the m

- College students in a large psychology class take a final exam. The mean exam score is 85, and the standard deviation is 5.

**Instruction**: Using the formula for*σ*M, what will the standard error of the mean (*σ*M ) be when:

a. the sample size is 25.

b. the sample size is 16.

c. the sample size is 20.