The Standard Error of the Mean for a Sample of 100

question 147

Multiple Choice

The standard error of the mean for a sample of 100 is 25.In order to cut the standard error of the mean in half (to 12.5) we must:

• A)increase the sample size to 200.
• B)decrease the sample size to 50.
• C)keep the sample size at 100 and change something else.
• D)None of these choices.

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