1. Say you've obtained a chi-square of 12.56. You have a chi square critical value of 3.481. Based on this information, what do you conclude?

A) Fail to reject the null hypothesis

B) Reject the Null Hypothesis

2. Say you’ve obtained a chi-square of 10.95. You have a chi square critical value of 9.210. Based on this information, what do you conclude?

A) Fail to reject the null hypothesis

B) Reject the Null Hypothesis

3. For the table below, what would be the chi-square critical value if you were doing a hypothesis test and your significance level was 0.01?

A 3.841

B 6.635

C 5.991

D 9.210

4) For the table below, what is the expected frequency for Yes Demoted and Pretty Happy? (Remember that you don't need to do all the expected frequencies to get just one…)

7

14

3

543

5. For the table below, what is the expected frequency for No Kids and Yes Counseling for Mental Problems? (Remember that you don’t need to do all the expected frequencies to get just one…)

42

16

692

259

6. For the table below, what is the expected frequency for No Demoted and Not too Happy? (Remember that you don't need to do all the expected frequencies to get just one…)

7

292

103

543

7. For the table below, what is the expected frequency for No Kids and No Counseling for Mental Problems? (Remember that you don’t need to do all the expected frequencies to get just one…)

42

16

692

259

8. In the table below, what is the column marginal for “ever had home broken into = no”?

3125

2133

2622

2636

9. For the table below, what is the chi-square? (Remember, you can round to whole numbers for the expected frequency, but leave at least 2 decimal places on for all other chi-square calculations).

0.04

0.94

0.36

0.82

10. For the table below, what is the chi-square? (Round this way or the answer will not turn out right: you can round to whole numbers for the expected frequency, but leave at least 2 decimal places on for all other chi-square calculations). Choose the answer that is closest.

6.92

2.69

5.96

4.85

11. You've obtained a chi square of 34.56, and it's significant. You want to test how strong the relationship between these two variables is. You have a sample size of 75. You have a table with 2 rows and 4 columns. What's your Cramer's V?

0.46

0.68

0.26

0.53

12. Say you have a phi-coefficient of 0.51. How strong is the relationship between the two variables it tests?

Weak Relationship

Moderate Relationship

Strong Relationship

13. You’ve obtained a chi square of 10.98, and it’s significant. You want to test how strong the relationship between these two variables is. You have a sample size of 50. What’s your phi-coefficient?

0.47

0.56

0.22

0.25

14. You’ve obtained a chi square of 16.52, and it’s significant. You want to test how strong the relationship between these two variables is. You have a sample size of 75. What’s your phi-coefficient?

0.47

0.22

0.69

0.18

15. Is the interpretation of the following regression line correct?

Regression line: $\stackrel{⏜}{y}=20.5+1.4\left(x\right)$

Interpretation: For every one unit increase in y, there is a 1.4 increase in x.

True

False

16. Is the interpretation of the following regression line correct?

Regression line: $\stackrel{⏜}{y}=0.89+2.3\left(x\right)$

Interpretation: For every one unit increase in y, there is a 0.89 increase in x.

True

False

17. Is the interpretation of the following regression line correct?

Regression line: y ⏜ = 0.5 − 1.7 ( x ) " style="max-width: 694px;" rel="max-width: 694px;">$\stackrel{⏜}{y}=0.5-1.7\left(x\right)$

Interpretation: For every one unit increase in x, there is a 1.7 decrease in y.

True

False

18. What type of relationship, positive or negative, is portrayed in the following sentence? When crime worsens, individuals' willingness to help their neighborhoods decreases.

Positive

Negative

19. What type of relationship, positive or negative, is portrayed in the following sentence? The statistical relationship shows that when foreclosure rates increase, crime worsens.

Positive

Negative

20. Find the correlation between the two following variables: % of people in neighborhood on welfare and the number of people who have police contact.

0.832

0.895

0.790

0.867

21. What is the strength of the following correlation? 0.156

Weak

Moderate

Strong

22. What is the strength of the following correlation? 0.451

Weak

Moderate

Strong

23. A friend of yours suggests that at least 10% of people at your university have had something stolen from them on campus in the past year. This is your population value. You take a random sample of 100 people in you classes to determine if your friend is correct, you think that they may be wrong. You find that 15% of them have had something stolen.

Would you use z or t to test this hypothesis?

Z Distribution

T Distribution

24. A friend of yours suggests that at least 10% of people at your university have had something stolen from them on campus in the past year. This is your population value. You take a random sample of 100 people in you classes to determine if your friend is correct, you think that they may be wrong. You find that 15% of them have had something stolen.

Would you have a one or two tailed test?

One tailed

Two Tailed

25. A friend of yours suggests that at least 10% of people at your university have had something stolen from them on campus in the past year. This is your population value. You take a random sample of 100 people in you classes to determine if your friend is correct. You find that 15% of them have had something stolen.

What is the value of your test statistic?

1.667

2.112

1.521

1.231

26. What are the age differences among teens that report being delinquent (or not)? Conduct a two mean hypothesis test to ascertain whether there is an age difference between teens who report being delinquent and teens that report no delinquency. Use a significance level of α = 0.05 and the information below.