When Do Researchers Use T Distributions and the Family of T

question 1

Multiple Choice

When do researchers use t distributions and the family of t tests to seek support for a relationship between variables rather than simply computing confidence intervals based on the normal distribution (as described in Chapter 5) ?

• A) When the mean of the dependent variable within the research sample is not known.
• B) When the mean of the dependent variable within the population is badly skewed.
• C) When the standard deviation of the dependent variable within the population is not known.
• D) When the dependent variable is less than interval level.

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