Which Correlation Coefficient Should We Use If We Want to Find

question 9

Multiple Choice

Which correlation coefficient should we use if we want to find out whether a relationship exists between scores from one interval variable and one ordinal variable?

• A)The Pearson correlation coefficient
• B)The Spearman rank-order correlation coefficient
• C)The point-biserial correlation coefficient
• D)The nonlinear correlation coefficient

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Definitions:

Test Statistic

A value calculated from sample data during hypothesis testing, used to determine whether to reject the null hypothesis.

Critical Value

A threshold in a statistical test that defines the boundary for deciding whether a test statistic leads to the rejection of the null hypothesis.

Sample Mean

The average of all the data points in a sample, used as an estimate of the population mean.

Sample Standard Deviation

A measure of the dispersion or variability of data points in a sample from the sample mean.