Name That Correlation

NAME THAT CORRELATION TEST

Scroll down to the bottom for the answers

1. A school district want= s to know if 1^st to 6^th grade students who perform well on= the language portion of the STAR 9 test also tend to= score well on the math portion of the test. What statistical test would determine if there were a signif= icant correlation between students’ scores on these tests?

2. For pe= ople who drink alcohol and smoke cigarettes, does the average amount of liquor people consume correlate with the average amount of cigarettes they consume? If one collected data from 300 respondents on their drinking and smoking behavior, what statistical test sho= uld be employed?

3. At least two international organizations keep track= of civilian casualties in Iraq: Human Rights Watch and www.IraqiBodyCount.org A researcher wants to know if the estimates of these two organizations agree over time. The researcher compares the two groups’ estimates of civilian casualties for each month over the past= 24 months. What statistical tes= t is appropriate to see if their estimates agree significantly?

4. H: Obesity (based on BMI scores) will correlate negatively with self esteem (based on Rosenberg’s Self-Esteem scale). What statistical test should be used to test this hypothesis?=

5. Two Speech Language Pathologists independently exam= ine eight children for language delay. Each therapist ranks orders the children from least delayed (#1) to = most delayed (#8). What statistical test would determine if the two sets of rankings were in agreem= ent?

6. A graduate program in Communication Arts & Sci= ences wants to know if applicants’ GRE scores, when they apply for admissio= n to the graduate program, correspond with their GPAs once they are enrolled in = the graduate program. Based on the table below, do GRE scores correlate with graduate GPAs? Use the SPSS software to determine the answer.

Student

1

2

3

4

5

6

7

8

9

10

11

12

GRE Score

710

610

640

580

545

560

610

530

560

540

570

560

GPA

4.0

4.0

3.9

3.8

3.7

3.6

3.5

3.5

3.5

3.3

3.2

3.2

7. A psychologist investigates the relationship betwe= en the average daily amount of television viewing and the reading skills of children. The pattern of results in t= he table below suggests which of the following conclusions?

A. TV viewing increases reading comprehension but doe= s not increase reading speed.

B. TV viewing correlates more strongly with reading s= peed than reading comprehension.

C. TV viewing correlates more strongly with reading comprehension than to reading speed.

D. TV diminishes the relationship between reading spe= ed and reading comprehension.

E. TV viewing has a diminishing relationship to readi= ng skills as the child grows order.

Age

Correlation <= /o:p>

Between Hours

Of Television

Viewing and Reading Speed

Correlation <= /o:p>

Between Hours of Television Viewing and Readi= ng Comprehension

6

+0.13 <= /span>

-0.31 <= /span>

7

-0.03 <= /span>

-0.35 <= /span>

8

+0.07 <= /span>

-0.41 <= /span>

9

-0.05 <= /span>

-0.43 <= /span>

10

+0.18 <= /span>

-0.46 <= /span>

8. All of the following are important assumptions of the Pearson r, except:

A. a bivariate correlation is being tested

B. the researcher has interval or ratio data

C. the suspected correlation is linear, as opposed to curvilinear

D. the suspected correlation is positiv= e, as opposed to negative

9. A child psychologist compares three conditions that involve children ages 10-15 viewing violence. One group is exposed to violent ca= rtoon shows. Another group is expos= ed to violent videogames. Another g= roup is exposed to violent reality shows. The dependent variable is a measure of the amount of antisocial beha= vior the children from each condition display on the playground during recess at school. What statistical test shoul= d be used?

A. Pearson r

B. Kendall’s tau

C. Correlation coefficient

D. Spearman rho

E. a correlation test is inappropriate

10. On average, men tend to marry women who are slightly younger than themselve= s.

Suppose that every man married a woman who was exactly .5 of a year

younger than himself. Which of the following is correct?

A. the correlation is −.5.

B. the correlation is .5.

C. the correlation is 1.

D. the correlation is −1.

E. the correlation is 0

11. A bivariate correlation with ranked data requires:

A. Spearman rho

B. Pearson r

C. Cramer’s V

D. Chi square

Answers: 1. Pearson r, 2. Pearson r, 3. Pearson r, 4. Pearson r, 5. Spearman rho, 6. Pearson r, 7. E, 8. D, 9. E, 10. B, 11= . Spearman rho.

Student	1	2	3	4	5	6	7	8	9	10	11	12
GRE Score	710	610	640	580	545	560	610	530	560	540	570	560
GPA	4.0	4.0	3.9	3.8	3.7	3.6	3.5	3.5	3.5	3.3	3.2	3.2

Age	Correlation <= /o:p> Between Hours Of Television Viewing and Reading Speed	Correlation <= /o:p> Between Hours of Television Viewing and Readi= ng Comprehension
6	+0.13 <= /span>	-0.31 <= /span>
7	-0.03 <= /span>	-0.35 <= /span>
8	+0.07 <= /span>	-0.41 <= /span>
9	-0.05 <= /span>	-0.43 <= /span>
10	+0.18 <= /span>	-0.46 <= /span>