Find the Expected Value Find the Expected Value of Height for Women at This

question 53

Multiple Choice

Find the expected value.
-The following table gives the distribution of heights for female students at one U.S. college. $$\begin{array}{l}\text { Height category }\\\begin{array} { l | l } \text { (inches) } & \text { Percentage } \\\hline 57 - 59 & 7.2 \\60 - 62 & 20.5 \\63 - 65 & 36.9 \\66 - 68 & 19.7 \\69 - 71 & 10.5 \\72 \text { and over } & 5.2\end{array}\end{array}$$ Find the expected value of height for women at this college. Use the midpoint of each category, (for example use 58 for the 57-59 category) . Use 74 for the 72 and over category.

• A)64.7 in.
• B)63.9 in.
• C)64.3 in.
• D)65.1 in.

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Definitions:

Criterion

A standard, rule, or test by which something can be judged or measured.

Absolute Threshold

The minimum intensity of a stimulus that one can perceive or detect 50% of the time.

Perceptual Invariance

The ability to recognize objects as remaining the same under different conditions, such as changes in lighting, angle, or distance.

Action Potentials

The rapid rise and fall of electrical voltage across a cell's membrane, allowing neurons to transmit signals along their axons.