Replacement Times for TV Sets Are Normally Distributed with a Mean

question 22

Short Answer

Replacement times for TV sets are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years, (based on data from "Getting Things Fixed," Consumer Reports).

-One classic use of the normal distribution is inspired by a letter to Dear Abbey in which a wife claimed to have given birth 308 days after a brief visit from her husband, who was serving in the Navy. The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. Given this information, the probability of a pregnancy lasting 300 days or longer is_____ . The result suggests that the husband ( (is/is not) ) the father of the child.

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Definitions:

Body

In a biological context, it refers to the physical structure of an organism, including its bones, muscles, and organs.

Relationship

A connection, association, or involvement between two or more parties, often described in a social, emotional, or professional context.

Scope

The extent of the area or subject matter that something deals with or to which it is relevant.

Direct Approach

A straightforward method of communication or action where the main point is presented at the beginning.