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# Statistics MCQ

### Which of the following is one of the assumptions for hypothesis testing of the Pearson’s correlation coefficient?

Correct Answer: There is random sampling of X-Y pairs.

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### Which of the following statements about the correlation coefficient is TRUE?

Correct Answer: One should not accept that a correlation coefficient represents a relationship unless it is significant.

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### The alternative hypothesis in a two-tailed significance test of correlation states that ______.

Correct Answer: A correlation exists in the population

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### A correlated-groups t test ______.

Correct Answer: Compares sample means for two related groups

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### This chapter illustrates that you can also incorporate ______ into the correlation coefficient.

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### If the null hypothesis is not supported, then the t test should be ______.

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### If the null hypothesis is TRUE, then the t test should be close to ______.

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### The null hypothesis in a two-tailed significance test of correlation states that ______.

Correct Answer: No correlation exists in the population

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### How many degrees of freedom do we have in significance testing of r?

Correct Answer: N - 2, where N equals the total number of Xs plus the total number of Ys

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### Which of the following is an example of a null hypothesis for testing a correlation coefficient?

Correct Answer: H0: ρxy = 0

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### What does the shape of any particular sampling distribution of a correlation coefficient depend on?

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