As the degrees of freedom (DF) increases, the chi-square distribution move more toward the right

Question 3 options:

True False

If you have a 5x4 contingency table, what would your critical value ofX2

be if testing at the .01 level of significance?

Question 12 options:

26.22

18.55

21.03

Not enough information

Pearson's correlation coefficient in a sample is symbolized by ___ and ranges from ___ to ___.

Question 13 options:

r, -1 to 1

X2, 0 to infinity

t, -4 to 4

, 0 to 1

You are interested in examining whether children who have been victims of child sexual abuse skip school a greater number of days when they are in high school than children who have not been victims of child abuse.You take a sample of 300 youth and measure whether they have been victims of child abuse or not.You then calculate the average number of days they skipped school during the previous year in high school.What is your research hypothesis?

Question 21 options:

H₁: ₁> ₂

H₁: ₁< ₂

H₁: _{1 2}

H₁: ²> 0

A research wants to know if negative perceptions of mental illness will change after taking Professor Gann's Mental Health and Criminal Justice course. Prior to the course, Prof. G. surveyed 8 (willing) students about their perceptions of violence among those who have been diagnosed with a mental disorder using a 5 question survey with a scale from 1 (not very violent) to 5 (very violent). She added up the scores across all 5 questions are compiled a Mental Health Perceptions (MHP) score. After the same students took the course, Prof. G. re-surveyed the students with the same questionnaire. Below are the scores on the perception of mental illness and violence before and after the course. The highest a student could score is a 25, and the lowest was 5:

MHP Before Course MHP After Course

21 15

19 11

12 8

5 5

8 5

6 7

8 5

20 12

You want to know if there is a significant difference between the scores for the students. To test this, use the .05 level of confidence. What is the calculated statistic and what can you conclude about Prof. G.'s research?

Question 23 options:

t=3.29; fail to reject the null and conclude that there is not a significant difference between the scores

t=3.29; reject the null and conclude that there is a significant difference between the scores

t=1.89; reject the null and conclude that there is a significant difference between the scores

t=1.89; fail to reject the null and conclude that there is not a significant difference between the scores

You are interested in knowing whether there is a relationship between the number of nights a person goes out to bars in a month, and the number of times they have been victimized. You take a sample of 8 college students and ask them about the number of times they went out to bars in the last month, and the number of times they have been physically, verbally, or sexually assaulted. Calculate a Pearson's r coefficient and test your hypothesis at the .05 confidence level. What is you calculated statistic and what can you conclude about the research?

Number of Victimizations Number of Nights Out

2 0

7 21

3 6

1 3

0 5

10 28

2 15

5 18

Question 1 options:

r=.45; fail to reject the null and conclude that there is not a significant, correlation between the number of victimizations a person has and the number of nights they go out to bars.

r=.89; reject the null and conclude that there is a significant, positive correlation between the number of victimizations a person has and the number of nights they go out to bars.

r=.89; fail to reject the null and conclude that there is not a significant, correlation between the number of victimizations a person has and the number of nights they go out to bars.

r=.45; reject the null and conclude that there is a significant, positive correlation between the number of victimizations a person has and the number of nights they go out to bars.