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Chapter 6: Q. 6 (page 285)

State two of the main reasons for studying the normal distribution.

Short Answer

Expert verified

The normal distribution can be expressed with a bell-shaped curve.

The curve is as follows:

Step by step solution

01

Given Information 

What the two of the main reasons for studying the normal distribution.

02

Explanation 

The following are two of the most important reasons to learn the normal distribution.

The result of statistical information relating to practical phenomena can be simply interpreted using the normal distribution.

For example, blood pressure, school grades, and so on.

The normal distribution can be expressed with a bell-shaped curve.

The curve is as follows:

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Most popular questions from this chapter

A variable is normally distributed with a mean 68and standard deviation 10. Find the percentage of all possible values of the variable that

a. lie between 73and 80.

h. are at least 75.

c. are at most 90.

Desert Samaritan Hospital in Mesa, Arizona, keeps records of emergency room traffic. Those records reveal that the times between arriving patients have a special type of reverse-J-shaped distribution called an exponential distribution. The records also show that the mean time between arriving patients is 8.78 minutes.

a. Use the technology of your choice to simulate four random samples of75 interarrival times each.

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