Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 2: Q 81. (page 143)

Normal states? The Normal probability plot displays data on the areas (in thousands of square miles) of each of the 50 states. Use the graph to determine if the distribution of land area is approximately Normal.

Short Answer

Expert verified

No, it is not approximately normal.

Step by step solution

01

Given information

The figure is:

02

Concept

The distance between the minimum and maximum values from the mean must be the same for the distribution to be normal.

03

Explanation

The data points in the provided image do not follow a linear trend, and curvature can also be seen in the provided normal probability plot. As a result, the distribution of land area could be described as non-normal.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Normal highway driving? The dot plot shows the EPA highway gas mileage estimates in miles per gallon (mpg) for a random sample of 21 the model year 2018 midsize cars.11 Explain why this distribution of highway gas mileage is not approximately Normal.

Normal curve Estimate the mean and standard deviation of the Normal density curve below.

Runners’ heart rates The following figure is a Normal probability plot of the heart rates of 200male runners after 6 minutes of exercise on a treadmill.14 Use the graph to determine if this distribution of heart rates is approximately Normal.

Where’s the bus? Sally takes the same bus to work every morning. The

amount of time (in minutes) that she has to wait for the bus can be modeled by a uniform distribution on the interval from 0 minutes to 10 minutes.

a. Draw a density curve to model the amount of time that Sally has to wait for the bus. Be sure to include scales on both axes.

b. On what percent of days does Sally wait between 2.5 and 5.3 minutes for the bus?

c. Find the 70th percentile of Sally’s wait times.

Lefties (1.1) Students were asked, “Are you right-handed, left-handed, or ambidextrous?” The responses (R=right-handed, L=left-handed, A=ambidextrous ) are shown here.

a. Make an appropriate graph to display these data.

b. Over 10,000 Canadian high school students took the Census At School survey that year. What percent of this population would you estimate is left-handed? Justify your answer.
See all solutions

Recommended explanations on Math Textbooks

Discrete Mathematics

Read Explanation

Probability and Statistics

Read Explanation

Pure Maths

Read Explanation

Logic and Functions

Read Explanation

Geometry

Read Explanation

Calculus

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free