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# Correlation coefficient r

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Calculate the correlation coefficient r, letting Row 1 represent the x-values and Row 2 the y-values. Then calculate it again, letting Row 2 represent the x-values and Row 1 the y-values. What effect does switching the variables have on r?

Row 1 20 26 34 43 51 69 72
Row 2 165 144 112 180 207 146 165

a) Calculate the correlation coefficient r, letting Row 1 represent x-values and Row 2 the y-values.

r = ??? (round to three decimal places)

b) Calculate the correlation coefficient r, letting Tow 2 represent x-values and Row 1 the y-values.

r = ??? (round to three decimal places)

c) What effect does switching the variable have on the correlation coefficient?

The correlation coefficient (increases, decreases, changes sign or remains unchanged) when the x-value and y-values are switched. (choose one)

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This solution answers questions regarding correlation coefficients.

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Calculate the correlation coefficient r, letting Row 1 represent the x-values and Row 2 the y-values. Then calculate it again, letting Row 2 represent the x-values and Row 1 the y-values. What effect does switching the variables have on r?

Row 1 20 26 ...

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• BSc, Meerut University
• MSc, Meerut University
• MPhil, Institute of Advanced Studies
• MSc, AIT
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##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.