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
A study was conducted to determine whether big-city and small-town dwellers differed in their helpfulness to strangers. In the study, the investigators
| 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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