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Chapter 6: Q.6.126 (page 285)

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

The variable in consideration is not essentially normal, and there is an outlier.

Step by step solution

01

Given Information

Consider the probability of the normalcy plot.

02

Explanation

The data is not distributed along a straight line, as evidenced by the given normality probability plot.

As a result, the variable in consideration is not essentially normal, and there is an outlier.

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Most popular questions from this chapter

Explain how to obtain normal scores from Table III in Appendix A when a sample contains equal observations.

A variable is normally distributed with mean 6and standard deviation 2.

Part (a): Determine and interpret the quartiles of the variable.

Part (b) Obtain and interpret the 85thpercentile.

Part (c) Find the value that 65%of all possible values of the variable exceed.

Part (d) Find the two values that divide the area under the corresponding normal curve into a middle area of 0.95and two outside areas of 0.025. Interpret your answer.

Explain how Table II is used to determine the area under the standard normal curve that lies

a. to the left of a specified z-score.

b. to the right of a specified z-score.

c. between two specified z-scores.

Emergency Room Traffic. Desert Samaritan Hospital in Mesa, Arizona, keeps records of emergency room traftic. Those records reveal that the times between arriving patients have a mean of 8.7 minutes with a standard deviation of 8.7 minutes. Based solely on the values of these two parameters, explain why it is unreasonable to assume that the times between arriving patients is normally distributed or even approximately so.

Obtain the z-score that has an area0.70 to its right.
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