/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 6.131 In the special report "Mousetrap... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 6: Q. 6.131 (page 285)

In the special report "Mousetrap: The Most-Visited Shoe and Apparel E-tailers" (Footwear News. Vol. 58. No. 3. p. 18), we found the following data on the average time, in minutes, spent per user per month from January to June of one year for a sample of 15 shoe and apparel retail Web sites.

a. Obtain a normal probability plot of the given data.

b. Use part (a)to identify any outliers.

c. Use part (a)to assess the normality of the variable under consideration.

Short Answer

Expert verified

a. As a result, the normal probability curve for the average time spent per user is shown above.

b. As a result, there are no outliers in the normal probability graph.

c. As a result, the average amount of time spent by each user is roughly normal.

Step by step solution

01

Part (a) Step 1: Given Information 

Normal probability plot of the given data. The consider average time spent per user.

02

Part (a) Step 2: Explanation

The normal probability plot of the given data.

Arrange the given data in ascending order first, then use the table to calculate the normal scores.

Create a normal probability plot, as shown below.

As a result, the normal probability curve for the average time spent per user is shown above.

03

Part (b) Step 1: Given Information 

The outliers in normal probability plot of parta.

04

Part (b) Step 2: Explanation 

Take a look at part's normal probability plot.

The information is arranged in a straight line. However, there are no outliers in the plot.

As a result, there are no outliers in the normal probability graph.

05

Part (c) Step 1: Given Information 

The normality of the variable under consideration.

06

Part (c) Step 2: Explanation 

Consider portion a's normal probability plot.

The information is arranged in a straight line.

The variable under examination is a linear variable.

As a result, the average amount of time spent by each user is roughly 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.

Over 30 million students worldwide already upgrade their learning with 91影视!

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

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

Express thekth percentile, Pk, of a normally distributed variable in terms of its mean, 渭, and standard deviation, 蟽.

Without consulting Table II, explain why the area under the standard normal curve that lies to the right of 0 is 0.5.

Determine the z-score for which the area under the standard normal curve to its left is0.01.

Each year, thousands of high school students bound for college take the Scholastic Assessment Test (SAT). This test measures the verbal and mathematical abilities of prospective college students. Student scores are reported on a scale that ranges from a low of 200to a high of 800. Summary results for the scores are published by the College Entrance Examination Board in College Bound Seniors. In one high school graduating class, the SAT scores are as provided on the WeissStats site. Use the technology of your choice to answer the following questions.

a. Do the SAT verbal scores for this class appear to be approximately normally distributed? Explain your answer.

b. Do the SAT math scores for this class appear to be approximately normally distributed? Explain your answer.
See all solutions

Recommended explanations on Math Textbooks

Applied Mathematics

Read Explanation

Pure Maths

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Calculus

Read Explanation

Logic and Functions

Read Explanation

Discrete Mathematics

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.