The Township of Middleton Sets the Speed Limit on Its

question 111

Short Answer

The township of Middleton sets the speed limit on its roads by conducting a traffic study and determining the speed (to the nearest 5 miles per hour) at which 80% of the drivers travel at or below. A study was done on Brown's Dock Road that indicated driver's speeds follow a normal distribution with a mean of 36.25 miles per hour and a variance of 6.25.
a. What should the speed limit be?
b. What percent of the drivers travel below that speed?

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Definitions:

Staircase Analysis

A step-by-step approach to breaking down information or data to understand hierarchical or sequential relationships.

Consumer Group

A consumer group consists of individuals and households that share similar needs and preferences in products or services.

Financial Metric

Quantitative measures used to assess and track the financial health, performance, or condition of a business, such as profit margins, ROI, or cash flow.

Product Platform

A set of common designs, components, and technologies used as a base upon which various products can be developed and manufactured.