If a Researcher Chooses a Confidence Level Greater Than the 95

question 110

Multiple Choice

If a researcher chooses a confidence level greater than the 95%, which of the following will occur?

• A) a smaller confidence interval that contains the population mean
• B) a larger confidence interval that contain the population mean
• C) a loss of precision in estimating the sample mean
• D) a loss of precision in estimating the population mean

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Definitions:

Random Assignment

The allocation of study participants to different groups by chance, minimizing pre-existing differences between those groups.

True Experiments

A type of scientific experiment where the researcher manipulates one variable, and controls/randomizes the rest of the variables.

Construct Validity

The degree to which a test or instrument accurately measures the theoretical construct it is intended to measure.

One-group Pretest-posttest Design

An experimental design where a single group is measured both before and after a treatment, assessing the treatment's impact.