The Expected Value of a Random Variable X Is 10

question 40

Multiple Choice

The expected value of a random variable X is 10 and the standard deviation is 2. The standard deviation of the random variable Y = 2X - 10 is:

• A)2
• B)4
• C)-10
• D)-6

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Definitions:

Profile-Of-A-Surface Tolerance

A geometric dimensioning and tolerancing specification that controls the form, orientation, and location of surfaces across the entire feature.

Straight, Flat Surfaces

Planar extents that are even and uniform, without curvature, essential in manufacturing and construction for accurate assembly and dimensional consistency.

Profile Tolerances

The permissible variation in a feature's contour or shape from its ideal form, which ensures the part can function correctly within its intended application.

Reference Numbers

Reference numbers are identifiers used on diagrams, drawings, or documents to link information or components to a detailed description, list, or specification.