For an Experimental Group in a Program to Reduce Anxiety

question 65

Multiple Choice

For an experimental group in a program to reduce anxiety, the mean pretest score is 80 (max = 100) . The posttest score is 70. This change was the result of

• A)regression
• B)program effectiveness
• C)maturation
• D)any of the above are possible

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Definitions:

Population Variances

A measure of the dispersion or spread of a population's values around the mean.

F-tests

F-tests are a class of statistical tests that compare the variances between groups to ascertain whether the means are significantly different, often based on F distribution.

One-tailed Tests

A type of hypothesis test that determines if there is a significant difference in a specific direction between the compared groups.

Population Variances

A measure of the dispersion of a population's values, quantifying how much the members of the population differ from the population mean.