If X Is Normally Distributed with Mean 12 and Standard

question 3

Multiple Choice

If x is normally distributed with mean 12 and standard deviation 2,then P(x ≤ 9) is

• A)P(z ≤ 9/10).
• B)P(z ≤ −3/2)
• C)P(z ≤ 2/3)
• D)P(z ≤ −3/4)

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Definitions:

Experimental Design

A research strategy that involves manipulating one or more variables to determine their effect on a dependent variable while controlling other factors.

Maturation

The process of growth or development over time, which can influence outcomes in longitudinal studies due to naturally occurring changes within the subjects being studied.

Experimental Design

A structured research approach that manipulates one variable to determine its effect on another variable, allowing for causal inferences.

Internet

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