### 9.3 Describing Dispersion

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• Math Help

Here are some observations and examples of bimodal distributions, flat distributions, right-skewed distributions, and left-skewed distributions (shown below).

Bimodal distributions
• These can occur when two separate normal distributions are combined.
• Example: the time of day people go to a restaurant; It would be high around lunch and then again around dinner.
Flat distributions
• The frequencies are almost the same. When the frequencies are exactly the same, it is called a uniform distribution.
• Example: rolling a die; The frequency for each number should be almost the same.
Right-skewed distributions
• Named for the direction of the "tail" of the graph. So, a right-skewed distribution has a "tail" to the right.
• Example: salaries at a company where a few executives have much higher salaries
Left-skewed distributions
• Named for the direction of the "tail" of the graph. So, a left-skewed distribution has a "tail" to the left.
• Example: scores on a test where a few students have low scores

• Consumer Suggestion

Over the years, Hasbro has acquired large toy and board game companies, such as Playskool, Milton Bradley, and Parker Brothers. Hasbro is one of the largest toy makers in the world. To explore the company's products and games, play games, and shop, visit the company's website.

• Checkpoint Solution

Because Chutes and Ladders and Cootie tend to take fewer turns to finish than Candyland, those two games should be marketed to a slightly younger age group than Candyland because the younger age group may be less patient and less willing to play a game that takes too many turns.

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