An Independent Variable in an Experiment Refers to

question 221

Multiple Choice

An independent variable in an experiment refers to

• A)the variable that is held constant across experimental conditions.
• B)the variable that affects the subjects' behavior.
• C)the variable that the experimenter believes will change in value because of systematic correlations that exist in the experiment.
• D)the variable that provides an alternative explanation for the results of the experiment.

---

Definitions:

Standard Error

A measure that describes the distribution of sample means around the population mean, indicating the precision of the sample mean as an estimate of the population mean.

Plus Four Estimate

A method used in statistics to adjust a sample size by adding four observations: two at the high end and two at the low end of the dataset.

Sampling Variability

The natural variation in statistics (such as the mean) that occurs from one sample to another.

SRS

Simple random sampling, a basic probabilistic method ensuring each member of a population has an equal chance of being included in the sample.