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Testing Relationships using Correlation Coefficient MCQ
# Statistics MCQ

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

**Answer**

**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?

**Answer**

**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 ______.

**Answer**

**Correct Answer:
****A correlation exists in the population**

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### A correlated-groups t test ______.

**Answer**

**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.

**Answer**

**Correct Answer:
****Statistical significance**

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

**Answer**

**Correct Answer:
****Greater than ±1.00**

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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 ______.

**Answer**

**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?

**Answer**

**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?

**Answer**

**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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### What is the name of the Greek letter ρ?

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### If after calculating a correlated-groups t test you find that it is equal to zero, then ______.

**Answer**

**Correct Answer:
****The two means do not differ significantly**

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