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Chapter 6: Q.6.121 (page 283)

We have provided a normal probability plot of data from a sample of a population. In each case, assess the normality of the variable under consideration.

Short Answer

Expert verified

There are no outliers in the data, which is usual.

Step by step solution

01

Given Information

Consider the probability of the normalcy plot.

02

Explanation

The data is distributed along a straight line, according to the specified normality probability plot.

As a result, the data is normal and there are no outliers.

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Most popular questions from this chapter

The National Center for Health Statistics publishes information about birth rates (per 1000population) in the document National Vital Statistics Report. The following table provides a frequency distribution for birth rates during one year for the 50states and the District of Columbia

a. Obtain a frequency histogram of these birth-rate data.

b. Based on your histogram, do you think that birth rates for the 50states and the District of Columbia are approximately normally distributed? Explain your answer.

31. Mortgage Industry Employees. In an issue of National Mortgage News, a special report was published on publicly traded mortgage industry companies. A sample of 25mortgage industry companies had the following numbers of employees.

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b. Use part (a) to identify any outliers.
c. Use part (a) to assess the normality of the variable under consideration.

According to Table II, the area under the standard normal curve that lies to the left of 1.05is 0.8531. Without further reference to Table II, determine the area under the standard normal curve that lies

a. to the right of 1.05.

b. to the left of -1.05.

c. between -1.05and1.05

We have provided a normal probability plot of data from a sample of a population. In each case, assess the normality of the variable under consideration.

Determine the two z-scores that divide the area under the standard normal curve into a middle 0.99area and two outside0.005 areas.
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