Question

In Exercises 6–10, assume that women have diastolic blood pressure measures that are normally distributed with a mean of 70.2 mm Hg and a standard deviation of 11.2 mm Hg (based on Data Set 1 “Body Data” in Appendix B).

Diastolic Blood Pressure The accompanying normal quantile plot was constructed from the diastolic blood pressure levels of a sample of women. What does this graph suggest about diastolic blood pressure levels of women?

Short answer

The diastolic blood pressure levels of women are normally distributed.

Step-by-step solution

Given information

A normal quartile plot for the blood pressure levels of women is given.

Define a normality plot

A normality plot is a graph for paired observed values and corresponding z scores.

If the dots of the graph fall on a straight-line pattern, the data can be concluded to have been originated from the normal distribution.

Identify the normal pattern in the normality plot

The pattern of points in the given normal probability plot falls on a straight line (linear). Thus, this suggests that the diastolic blood pressure levels of women are normally distributed.