Find the Mean of the Given Probability Distribution A)360
B)3

question 21

Multiple Choice

Find the mean of the given probability distribution.
-The random variable x is the number of houses sold by a realtor in a single month at the Sendsom's Real Estate office. Its probability distribution is as follows. $$\begin{array} { r | r } \text { Houses Sold } ( \mathrm { x } ) & \text { Probability P(x) } \\\hline 0 & 0.24 \\1 & 0.01 \\2 & 0.12 \\3 & 0.16 \\4 & 0.01 \\5 & 0.14 \\6 & 0.11 \\7 & 0.21\end{array}$$

• A)3.60
• B)3.40
• C)3.50
• D)3.35

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Definitions:

Test-Retest Reliability

Giving the test twice to the same group of people and then correlating the scores of the first test with those of the second test to determine the reliability of the instrument.

Sten

A standard ten scale used for scoring and interpreting psychological and other types of tests, where scores are often transformed to fit a scale ranging from 1 to 10.

DIQ

An abbreviation often used for Differential Intelligence Quotient, though not commonly recognized in standard intelligence testing terminology.

NCE

Stands for the National Counselor Examination, a comprehensive assessment for those seeking counseling certification.