If Researchers Are Interested in Whether or Not It Is

question 86

Multiple Choice

If researchers are interested in whether or not it is possible for a person to have a reaction time less than 0.05 seconds,and they simply measure the reaction times of volunteers who sign up for the study,what rationale would the researchers give for not using random sampling?

• A)Sometimes generality does not matter.
• B)Sometimes generality cannot be determined.
• C)Sometimes generality can be determined.
• D)Sometimes generality is best determined by nonrandom sampling.

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Definitions:

Degrees of Freedom

The total number of unique values or amounts that can be given to a statistical distribution.

Effect Size

A quantitative measure of the magnitude of a phenomenon or the strength of the relationship between variables.

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true, typically set at 0.05 or 5%.

Degrees of Freedom

Represents the number of independent pieces of information available to estimate another piece of information or parameter in a dataset.