At Folger University,Drs

question 182

Multiple Choice

At Folger University,Drs.Chase and Sanborn are conducting an experiment on the effects of caffeine on memory.Participants are randomly assigned to a caffeine or a no-caffeine group; later their recall of items on a word list is assessed.In this experiment,word recall is the _____ variable.

• A) experimental
• B) control
• C) independent
• D) dependent

---

Definitions:

Standard Deviation

A gauge for assessing the spread or differentiation of values within a group of data points.

Variance

A measure of the spread of a set of values, calculated as the average of the squared deviations from the mean.

Population Mean

The average of all the values in a population, calculated by summing all the values and dividing by the count of values.

Sample Mean

The average value computed from a sample of data, used to estimate the population mean.