Calculating Correlations
Pearson Product-Moment Correlation for
Relationship Between two Variables

The correlation coefficient is a statistical measure of relationship ranging from
-1.00 (a perfect negative relationship) to 0.00 (no relationship) to +1.00 (a perfect positive relationship). The closer the correlation coefficient is to 1 (either positive or negative), the stronger the relationship is. For example, a correlation coefficient of +.89 indicates a very strong positive relationship between two variables, whereas -.17 suggests a very weak negative relationship between two variables.

For this activity you will record two variables from ten people and input the data in the computer. The correlation between the two variables will then be calculated once you press the calculate button. Select one topic from the following suggestions and ask each of the ten people the same question:
1- height of romantic couples (person 1 is variable A, person 2 is variable B)
2- number of movies attended in a year (variable A) AND number of CDs owned (variable B)
3- number of hours studied per week (variable A) AND GPA (variable B)
4- shoe size (variable A) AND height (variable B)

For each person, you will need two pieces of information:
(variable A & variable B)

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