Quiz #1 -- Homework 2: Bivariate Analyses
Psyc941 Quiz #2 Hw#3: Bivariate Statistics
DON'T HAND IN THIS SHEET!!!
Each of the participants came back one week later to complete a follow-up data collection session. First they were asked to remember the vignette they had read and to again rate the likelihood of their befriending this new neighbor, using the same scale. Then they read two additional vignettes that described new neighbors who had different "senses of humor" and rated the likelihood of turning each neighbor over to the police for their actions (using a 10-point for which a "10" meant they would definitely inform the police and a "1" meant they would definitely not inform the police). The first vignette (the "Joker vignette") told of a neighbor who loved practical jokes -- harmless things like putting your car in a tree or kidnapping your child for a day or two. The second vignette (the "Borrower vignette") described a neighbor who had a tendency to borrow things and take them to his house without asking -- small things such as your refrigerator or your bed. In the dataset below these variables are referred to as jokepol and borowpol, respectively. Finally they were asked to tell the number of close friends they had that were male (mclsfrnd) and female (fclsfrnd).
The New Data (add this to the dataset you already have)
subn rating2 jokepol borowpol mclsfrnd fclsfrnd
1 8 7 9 4 6
2 9 6 5 7 11
3 5 7 8 1 5
4 4 6 8 4 6
5 5 7 6 2 13
6 7 6 9 6 9
7 9 9 9 2 4
8 7 10 10 3 1
9 5 8 6 5 8
10 4 7 9 9 14
11 9 10 8 3 4
12 10 8 9 6 9
13 8 6 4 6 8
14 6 6 8 3 2
15 8 7 5 8 12
16 4 7 7 5 8
17 10 8 8 8 6
18 5 6 4 4 8
19 7 9 10 3 4
20 3 8 9 2 1
21 10 7 9 7 9
22 7 4 6 6 9
23 9 7 5 6 4
24 8 8 8 3 8
The researcher has several hypotheses. For each, you are to indicate the proper statistic (if both a t-test and an ANOVA is
appropriate, mention it, but perform and report the ANOVA !), and state the null hypothesis (make it specific to the
population and variables involved in the research hypothesis, don't just give the "bland version"!). When reporting the
results of each analysis, be sure to: 1) use the format given in the examples, be complete, 2) relate the results to the
research hypothesis (is the RH completely supported, partially supported, or not supported, why?).
Please Note: One or more of the analyses will require that you select a subset of the analysis before performing the statistical test!
Psyc941 Quiz #2 Hw#3: Bivariate Statistics
HAND IN THIS SHEET!!
All write-ups should follow the examples given in the SPSS handouts !!
0. After you have considered each of the research questions below, come back and tell which (if any) of the of the statistical results might be given a causal interpretation? Explain your answer.
1. The researcher hypothesized that younger folks are more likely to befriend the new neighbor (i.e., give a higher likelihood rating -- use the rating data collected during the first session).
proper stat test
H0:
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below.
2. There will be lower likelihood ratings given by those folks who read the vignette that described the new neighbor as
"quite standoffish" than those who read the new neighbor as "friendly" (use the rating data collected during the first session).
proper stat test
H0:
mean & stddev rating for "standoffish" version _______ _______ for "friendly" version __________ _________
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below. Show the data in a bar graph (Figure 1), on other paper.
3. People who read the "quite standoffish" vignette will give higher likelihood during the follow-up session than during the original session.
proper stat test
H0:
mean & stddev rating at original session _______ _______ at follow-up session __________ _________
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below. Show the data in a bar graph (Figure 2), on other paper.
4. Those with higher OFS scores should give higher likelihood ratings (use the rating data collected during the first session).
proper stat test
H0:
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below.
5. It was the researchers intention to have an equal number of males and females be presented with each version of the
vignette. (While this isn't really a research hypothesis, it can be tested using the proper statistic.)
proper stat test
H0:
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below. Show the contingency table (Table 2), on other paper.
6. It was hypothesized that participants would say they were more willing to call the police to report the "borrower" than to report the "joker".
proper stat test
H0:
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below. Show the stats for each condition in a table (Table 3), on other paper.
7. There will be no difference between the mean likelihood ratings of men and women (use the rating data collected during the first session).
proper stat test
H0:
mean & stddev rating for men _______ _______ for women __________ _________
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below. Show the stats for each condition in a table (Table 4), on other paper.
8. Men will prefer persons who are "interesting to be around" (code=3), whereas women will prefer "someone with "shared interests" (code=1) or "shared background" (code=2).
proper stat test
H0:
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below. Show the contingency table (Table 5), on other paper.
9. The researcher had two hypotheses about the number of close friends people reported having.
First, "Participants in this study will report having more male than female close friends."
proper stat test
H0:
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below.
Second, "Those participants with more female friends will tend to be those who also have more male friends."
proper stat test
H0:
test stat value ______________________ df ________________ p-value ______________
Report the result of your research hypothesis test below.
10. On other paper, make a Table1 that includes the univariate stats for all of the variables used in the various bivariate analyses.
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