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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Definitions:

Psychological Experiment

An investigation in which a researcher manipulates one or more variables to observe the effect on some behavior or mental process.

Negative Correlation

A relationship between two variables in which one variable increases as the other decreases, indicating an inverse association.

Correlation Coefficients

Statistical measures that describe the extent to which two variables change together, indicating the strength and direction of a linear relationship between them.

Direction And Strength

In psychology, often refers to the orientation and intensity of behaviors or attitudes.