Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 1: Q T1.6. (page 79)

Which of the following statements about this distribution is not correct?

(a) The histogram is right-skewed.

(b) The median is less than \(20

(c) The IQR is \)35

(d) The mean is greater than the median.

(e) The histogram is unimodal.

Short Answer

Expert verified

The correct option is (c) The IQR is $35

Step by step solution

01

Given information

Given

02

Concept

A statistical graph or chart is a visual representation of statistical data in graphical form.

03

Explanation

The QR cannot be 35 dollars because the third quartile is between 20 and 30 dollars. Therefore, option (c) is not correct (IQR is $35).

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

A survey was designed to study how business operations vary according to their size. Companies were classified as small, medium, or large. Questionnaires were sent to 200 randomly selected businesses of each size. Since not all questionnaires in a survey of this type are returned, researchers decided to investigate the relationship between the response rate and the size of the business. The data are given in the following two-ways

Which of the following conclusions seems to be supported by the data?

(a) There are more small companies than large companies in the survey.

(b) Small companies appear to have a higher response rate than medium or big companies.

(c) Exactly the same number of companies responded as didn’t respond.

(d) Small companies dislike larger companies.

(e) If we combined the medium and large companies, then their response rate would be equal to that of the small company

Feeling sleepy? The first four students to arrive for a first-period statistics class were asked how much sleep (to the nearest hour) they got last night. Their responses were 7,7,9,and 9

(a) Find the standard deviation from its definition. That is, find the deviations of each observation from the mean, square the deviations, then obtain the variance and the standard deviation.

(b) Interpret the value of sx you obtained in (a).

(c) Do you think it’s safe to conclude that the mean amount of sleep for all 30 students in this class is close to 8 hours? Why or why not?

Fuel economy (Introduction) Here is a small part of a data set that describes the fuel economy (in miles per gallon) of model year 2009 motor vehicles:

(a) What are the individuals in this data set?

(b) What variables were measured? Identify each as categorical or quantitative.

C-sections Do male doctors perform more cesarean sections (C-sections) than female doctors? A study in Switzerland examined the number of cesarean sections (surgical deliveries of babies) performed in a 100. Section 1.3 Describing Quantitative Data with Numbers 73 year by samples of male and female doctors. Here are summary statistics for the two distributions:

(a) Based on the computer output, which distribution would you guess has a more symmetrical shape? Explain.

(b) Explain how the IQRs of these two distributions can be so similar even though the standard deviations are quite different.

(c) Does it appear that males perform more C-sections? Justify your answer

The National Survey of Adolescent Health interviewed several thousand teens (grades 7 to 12). One question asked was “What do you think are the chances you will be married in the next ten years?” Here is a two-way table of the responses by gender:

Your percent from the previous exercise is part of

(a) the marginal distribution of females.

(b) the marginal distribution of gender.

(c) the marginal distribution of opinion about marriage.

(d) the conditional distribution of gender among adolescents with a given opinion.

(e) the conditional distribution of opinion among adolescents of a given gender.
See all solutions

Recommended explanations on Math Textbooks

Geometry

Read Explanation

Statistics

Read Explanation

Pure Maths

Read Explanation

Decision Maths

Read Explanation

Applied Mathematics

Read Explanation

Theoretical and Mathematical Physics

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