Which of the following tests are used to test the impact of a treatment before and then after an intervention?

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Standard error

Correlation

Paired t-test

Student's t-test

A measure of the strength of the relationship between two variables is referred to as the

A) standard deviation of the estimate.

B) coefficient of determination.

C) standard error of the estimate.

D) coefficient of correlation.

For a standard normal distribution, which of the following variables always equals 0?

A) Population mean

B) Population standard deviation

C) Standard error

D) Median

Which of the following is true of random partitioning?

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