A Report States That the Mean Household Income Last Year

question 5

Multiple Choice

A report states that the mean household income last year for a certain rural county was $55,300 and the median was $62,800. If a histogram were constructed for the incomes of all
Households in the county, would you expect it to be skewed to the right, to the left, or
Approximately symmetric?

• A) skewed right
• B) skewed left
• C) approximately symmetric

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Definitions:

Mean

The average of a set of numbers, calculated by dividing the sum of all values by the number of values.

Median

A measure of central location provided by the value in the middle when the data are arranged in ascending order.

Uniform Distribution

A type of probability distribution in which all outcomes are equally likely.

Probability Density Function

An equation that indicates the probability of a random variable occurring at a certain value.