Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Study Time and Score. The negative relation between study time and test score found in Exercise 4.63has been discovered by many investigators. Provide a possible explanation for it.

Short Answer

Expert verified

Stress will be experienced by the investigators.

Step by step solution

01

Given Information

The purpose of this exercise is to identify the reason why the relationship between the study time and the test score in Exercise 4.63 was negative.

02

Explanation

According to the regression equation for Exercise 4.63, the time spent on study (x)will predict the student's score(y), but the time spent on studying is,

y^=94.8669-0.8456x

The students will be stressed if they study longer. But stress could cause them to score low on tests.

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 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 positive linear relationship between two variables means that one variable tends to increase linearly as the other------

Home Size and Value. The data from Exercise 4.74 for home size (in square feet) and assessed value (in thousands of dollars) for the same homes as in Exercise 4.157 are on the WeissStats site.

a. decide whether use of the linear correlation coefficient as a descriptive measure for the data is appropriate. If so, then also do parts (b) and (c).

b. obtain the linear correlation coefficient.

c. interpret the value of r in terms of the linear relationship between the mo variables in question.

6. What kind of plot is useful for deciding whether finding a regression line for a set of data points is reasonable?

Wasp Mating Systems. In the paper "Mating System and Sex Allocation in the Gregarious Parasitoid Cotesia glomerata" (Animal Behaviour, Vol. 66, pp. 259-264). H. Gu and S. Dorn reported on various aspects of the mating system and sex allocation strategy of the wasp C. glomerata, One part of the study involved the investigation of the percentage of male wasps dispersing before mating in relation to the brood sex ratio (proportion of males). The data obtained by the researchers are on the WeissStats site.

a. Obtain a scatterplot for the data.

b. Is it reasonable to find a regression line for the data? Explain your answer.

Top Wealth Managers. An issue of HAKRON'S presented information on top wealth managers in the United States bused on individual clients with accounts of $1million er more. Data were given for various variables, two of which were a number of private client managers and private client assets. Those data are provided on the WeissStats site, where private client assets are in ballons of dollars.

a. Obtain a scatterplot for the dater.

h. Decide whether finding a depression lime for the data is reasonable. If so, then also do jurras (e) (f).

See all solutions

Recommended explanations on Math Textbooks

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