The Formula for a 95% Confidence Interval for a Population

question 10

Multiple Choice

The formula for a 95% confidence interval for a population proportion is given by
) The entire "plus or minus part" of this confidence interval is also called the

• A) standard deviation.
• B) margin of error.
• C) confidence level.
• D) sampling distribution.

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Definitions:

Double-blind Procedure

An experimental setup in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.

Placebo Effect

A phenomenon where individuals experience a perceived or actual improvement in their condition despite receiving a treatment that has no therapeutic effect.

Control Groups

In experimental research, a group of subjects not exposed to the treatment or intervention being tested, serving as a baseline comparison for the experimental group.

Independent Variable

In an experiment, the variable that is manipulated or changed by the researcher to observe its effects on the dependent variable.