EDUR 8131
Correlation Exercise
Instructions:
Present results using the table format provided in the notes entitled "Reporting Statistical Outcomes." Do not include SPSS output or hand-worked calculations; do not present symbolic or written hypotheses; present only results tables and written comments on results.
1. Hypothesis: There is a relationship between academic self-efficacy and test anxiety. Data to test this hypotheses are provided below.
Table 1: Scores for self-efficacy and test anxiety
Student |
Academic Self-efficacy |
Test Anxiety |
Bob |
6 |
7 |
Billy |
5 |
9 |
Bertha |
9 |
7 |
Brent |
8 |
6 |
Bryan |
5 |
7 |
Brenda |
9 |
5 |
Bernie |
7 |
8 |
Note. Higher scores indicate high levels of each variable.
2. Do income in dollars per
year and size of house in square footage correlate with happiness?
Subject |
Size of House |
Income |
Happiness |
|
a |
7125 |
250,000 |
5 |
|
b |
1256 |
17,500 |
5 |
|
c |
1800 |
43,000 |
9 |
|
d |
1750 |
23,500 |
6 |
|
e |
3100 |
67,500 |
4 |
|
f |
3698 |
87,100 |
6 |
|
g |
900 |
19,700 |
8 |
|
h |
5100 |
117,500 |
3 |
|
j |
1952 |
37,500 |
7 |
|
k |
2350 |
22,000 |
8 |
|
l |
2000 |
24,000 |
5 |
|
m |
895 |
7,000 |
7 |
Note. Higher scores on the happiness scale indicate more happiness.
3. IGUANA: You want to determine whether there is a relationship between female iguana body weight and the number of eggs they produce. Data from 9 gravid iguanas are:
ID |
Weight |
Eggs |
1 |
0.90 |
33 |
2 |
1.55 |
50 |
3 |
1.30 |
46 |
4 |
1.00 |
33 |
5 |
1.55 |
53 |
6 |
1.80 |
57 |
7 |
1.50 |
44 |
8 |
1.05 |
31 |
9 |
1.70 |
60 |
4. DOLL-ECOL: Richard Doll studied the relationship between smoking and lung cancer in many different ways. In one of his earliest investigations, he compiled the information on per capita cigarette consumption in 1930 and lung cancer 20 years later in 1950 for the countries shown below. Is there a relationship between cigarette consumption per capita and mortality as a result of lung cancer?
|
Cig |
LungCA Mortality |
Country |
Consump |
(per 100,000 p-yrs) |
USA |
1300 |
20 |
GrBrit |
1100 |
46 |
Finland |
1100 |
35 |
Switzerland |
510 |
25 |
Canada |
500 |
15 |
Holland |
490 |
24 |
Australia |
480 |
18 |
Denmark |
380 |
17 |
Sweden |
300 |
11 |
Norway |
250 |
9 |
Iceland |
230 |
6 |