If the Random Variable X Is Normally Distributed with a Mean

question 79

Multiple Choice

If the random variable X is normally distributed with a mean of 75 and a standard deviation of 8, then P(X ≤ 75) is:

• A) 0.125 .
• B) 0.975 .
• C) 0.625 .
• D) 0.500 .

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Definitions:

Basic Motions

The fundamental human movements or actions that can be combined in various ways to perform work or tasks efficiently.

Therbligs

Fundamental motions required for a worker to perform manual operations, used in the study of motion economy.

Work Sampling

A statistical technique used for analyzing the work performance and estimating the proportion of time spent by workers on different activities.

Stopwatch Time Study

A method of work measurement used to establish standard times for activities by observing and timing tasks using a stopwatch.