The Standard Error of the Mean for a Sample of 100

question 34

Multiple Choice

The standard error of the mean for a sample of 100 is 30. In order to cut the standard error of the mean to 15, we would

• A) increase the sample size to 200.
• B) increase the sample size to 400.
• C) decrease the sample size to 50.
• D) decrease the sample to 25.

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Definitions:

Critical Value

A point on the scale of a test statistic beyond which we reject the null hypothesis, often associated with the desired significance level of a test.

Alpha

A threshold value used in hypothesis testing that defines the probability of making a Type I error, or rejecting a true null hypothesis.

Critical Value

A threshold in statistical testing that defines the boundary for rejecting the null hypothesis.