In Lang's Experiment Studying the Effects of Alcohol and the Effects

question 111

Multiple Choice

In Lang's experiment studying the effects of alcohol and the effects of expectations on aggression there were three groups: Group 1: Expected alcohol, received only tonic.
Group 2: Expected alcohol, received alcohol mixed with tonic.
Group 3: Expected tonic, received alcohol mixed with tonic.
Which of the following is true?

• A)Only Groups 2 and 3 were experimental groups.
• B)Only Group 1 was an experimental group.
• C)Group 1 was a control group.
• D)All three groups were experimental groups.

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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.