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Chapter 6: Q8 (page 281)

Interpreting Normal Quantile Plots.In Exercises 5–8, examine the normal quantile plot and determine whether the sample data appear to be from a population with a normal distribution.

Tornadoes The normal quantile plot represents the distances (miles) that tornadoes traveled (from Data Set 22 “Tornadoes” in Appendix B).

Short Answer

Expert verified

From the given normal quantile plot, it appears that the sample data of the distances (miles) that tornadoes travelled is not from a population that follows the normal distribution as the points do not form a straight-line pattern.

Step by step solution

01

Given information

The normal quantile plot of the sample data of distances (miles) that tornadoes traveled is constructed.

02

Interpretation of the normal quantile plot

A normal quantile plot is used to assess the normality of the data.

In a normal quantile plot, if the points follow a straight-line pattern, then the sample is said to be taken from a normally distributed population.

Here, approximately no point on the plot lies close to the straight line.

Therefore, the sample ofdistances (miles) that tornadoes traveled does not appear to be from a normally distributed population.

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