The Variance of a Sample of 169 Observations Equals 576

question 80

Multiple Choice

The variance of a sample of 169 observations equals 576.The standard deviation of the sample equals

• A) 13.
• B) 24.
• C) 576.
• D) 28,561.

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Definitions:

IQ

An acronym for Intelligence Quotient, a measure of a person's intellectual abilities in relation to their age group.

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.