Shannon Conducts an Experiment to Test Her Hypothesis That Longer

question 234

Multiple Choice

Shannon conducts an experiment to test her hypothesis that longer arguments cause couples to become angrier at each other.She randomly assigns couples to argue for either ten minutes or twenty minutes.After her assistant Ken runs the study, Ken tells Shannon that he allowed the couples who were really fighting hard to keep arguing longer than Shannon had originally stated.Shannon cringes, for she knows that the ________ of his study is very low.

• A) random assignment
• B) random selection
• C) internal validity
• D) meaningfulness

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Definitions:

Test Power

The probability that a statistical test will correctly reject the null hypothesis when it is false, indicating a test's effectiveness.

False Null Hypothesis

Incorrect rejection of a true null hypothesis, often referred to as a Type I error in statistical hypothesis testing.

Confidence Interval

An encompassing array of values, from sample data statistics, perceived to contain the unknown value of a population parameter.

Population Mean

The average of all the values in a population, representing the central tendency.