/*! 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}

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Q27BSC (page 1)

What鈥檚 Wrong? In Exercises 25鈥�28, identify what is wrong.

Motorcycles and Sour Cream: In recent years, there has been a strong correlation between per capita consumption of sour cream and the numbers of motorcycle riders killed in noncollision accidents. Therefore, consumption of sour cream causes motorcycle fatalities.

Short Answer

Expert verified

Correlation cannot assure the cause of the relationship.

Step by step solution

01

Given information

Two variables are strongly correlated:

  • Per capita consumption of sour cream
  • Motorcycle riders killed in non-collision accidents
02

Correlation interpretation

Two strongly correlated variables show a very strong linear pattern of association. Thus, the slope of the line that describes the relationship between two variables has a steep measurement.

03

Identifying the wrong element in the survey

If one variable is correlated with another, it does not guarantee that one can cause changes in the other.

In the study, it is known that consumption of sour cream is strongly related to non-collision accidents. However, it does not imply that consumption of sour cream causes motorcycle fatalities.

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

In Exercises 29鈥�36, answer the given questions, which are related to percentages.

Chillax USA Today reported results from a Research Now for Keurig survey in which 1458 men and 1543 women were asked this: 鈥淚n a typical week, how often can you kick back and relax?鈥�

a. Among the women, 19% responded with 鈥渞arely, if ever.鈥� What is the exact value that is 19% of the number of women surveyed?

b. Could the result from part (a) be the actual number of women who responded with 鈥渞arely, if ever鈥�? Why or why not?

c. What is the actual number of women who responded with 鈥渞arely, if ever鈥�?

d. Among the men who responded, 219 responded with 鈥渞arely, if ever.鈥� What is the percentage of men who responded with 鈥渞arely, if ever.鈥�?

e. Consider the question that the subjects were asked. Is that question clear and unambiguous so that all respondents will interpret the question the same way? How might the survey be improved?

Determine whether the sampling method appears to be sound or is flawed.

Nuclear Power Plants. In a survey of 1368 subjects, the following question was posted on the USA Today website: 鈥淚n your view, are nuclear plants safe?鈥� The survey subjects were Internet users who chose to respond to the question posted on the electronic edition of USA Today.

In Exercises 29鈥�32, indicate whether the observational study used is cross-sectional, retrospective, or prospective.

Nurses鈥� Health Study II Phase II of the Nurses鈥� Health Study was started in 1989 with 116,000 female registered nurses. The study is ongoing.

In Exercises 21鈥�28, determine whether the study is an experiment or an observational study, and then identify a major problem with the study.

Atkins Weight Loss Program An independent researcher tested the effectiveness of the Atkins weight loss program by randomly selecting 1000 subjects using that program. Each of the subjects was called to report their weight before the diet and after the diet.

In Exercises 17鈥�20, refer to the sample of body temperatures (degrees Fahrenheit) in the table below. (The body temperatures are from a data set in Appendix B.)

Context of the Data: Refer to the table of body temperatures. Is there some meaningful way in which each body temperature recorded at 8 AM is matched with the 12 AM temperature?
See all solutions

Recommended explanations on Math Textbooks

Mechanics Maths

Read Explanation

Applied Mathematics

Read Explanation

Pure Maths

Read Explanation

Probability and Statistics

Read Explanation

Calculus

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.