The Expected Value of a Discrete Random Variable

question 6

Multiple Choice

The expected value of a discrete random variable

• A)is the outcome that is most likely to occur.
• B)can be found by determining the 50% value in the c.d.f.
• C)equals the population median.
• D)is computed as a weighted average of the possible outcome of that random variable, where the weights are the probabilities of that outcome.

---

Definitions:

Positively Skewed

A description of a distribution that is asymmetric, with a longer tail to the right of the peak, indicating that the majority of values are concentrated on the left.

Negatively Skewed

Describes a distribution of data where the tail is longer on the left side of the distribution's peak, indicating that the majority of values are to the right of the mean.

Standard Deviation

A statistic that measures the dispersion or spread of a set of data points relative to its mean.

Standard Deviation

A statistical measure that indicates the dispersion or variability of a set of data points in relation to their mean.