The Sample Mean of the Variable Height in a Data

question 40

Multiple Choice

The sample mean of the variable height in a data set was found to be 68 inches, with a standard error of four inches. The researcher reported that the population or true mean height fell within one margin of error of the sample mean, at the 95% confidence level. What is the chance that the true mean is 75 inches or more?

• A) 95%
• B) 2.5%
• C) 5%
• D) 47.5%

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Definitions:

External Validity

External validity refers to the extent to which the results of a study can be generalized or extended to other situations, people, settings, and measures.

Experimenter Effects

Effects produced or influenced by clues to the hypotheses under examination, inadvertently communicated by the experimenter.

Laboratory Experiments

Controlled tests or investigations conducted in a lab setting where variables can be isolated and manipulated to study their effects.

Evaluation Apprehension

Worry about how others perceive or assess one's actions.