Question

1. in the study above, the researchers calculated differences between before and after exercise mood ratings for each participant and then computed the mean. what does this calculated mean represent? a) parameter b) variable c) statistic d) data

Explanation:

A parameter describes a population, a variable is a characteristic that can take on different values, and data is just the raw information. A statistic is a numerical characteristic of a sample. Here, the researchers are working with a sample (the study participants) and the mean of the differences in mood ratings is a numerical summary of that sample.

Answer:

C. Statistic