A study was conducted to determine whether big-city and small-town dwellers differed in their helpfulness to strangers. In the study, the investigators rang the doorbells of strangers living in Toronto or small towns in the vicinity. They explained they had misplaced the address of a friend living in the neighborhood and asked to use the phone. The following data show the number of individuals who admitted or did not admit the strangers (the investigators) into their homes: Admitted strangersinto their homeDid not admit strangersinto their home Big-city dweller6090 Small-town dweller7030 Conduct a chi-squared test to examine whether big-city dwellers differ in their helpfulness to strangers. Which of the following is/are true about the result of the test? A.The obtained chi-squared test statistic is 21.6346.B.The obtained pp-value is approximately 0.C.The obtained chi-squared test statistic is 8.450.D.The obtained pp-value is 0.004.E.A and BF.A and DG.B and CH.C and D

Here 2× 2 contingency table. By using chi- square test we get results.

Answered: study was conducted to determine…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A study was conducted to determine whether big-city and small-town dwellers differed in their helpfulness to strangers. In the study, the investigators rang the doorbells of strangers living in Toronto or small towns in the vicinity. They explained they had misplaced the address of a friend living in the neighborhood and asked to use the phone. The following data show the number of individuals who admitted or did not admit the strangers (the investigators) into their homes:

	Admitted strangers into their home	Did not admit strangers into their home
Big-city dweller	60	90
Small-town dweller	70	30

Conduct a chi-squared test to examine whether big-city dwellers differ in their helpfulness to strangers. Which of the following is/are true about the result of the test?

The obtained chi-squared test statistic is 21.6346.

The obtained pp-value is approximately 0.

The obtained chi-squared test statistic is 8.450.

The obtained pp-value is 0.004.

A and B

A and D

B and C

C and D

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