Assignment:
The zombie researcher is also interested in whether having been chased by a zombie in the past influences a person's attitude towards zombies. Attitude ratings following sensitivity training (ZOMB2) are provided for participants that have been chased by a zombie and for those that have never been chased by a zombie.
Complete this worksheet to test the hypothesis that being chased by a zombie or not has an effect on post-training ratings (ZOMB2 scores).Perform an independent t-test using the summary data provided, and by using JASP. Calculate the effect size and confidence interval statistics in your analysis.
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Chased by Zombies
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Never Chased by Zombies
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N = 14
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N = 16
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 = 9.786
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= 15.438
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sx= 5.381
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sx=6.229
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s2p = 34.23 (pooled variance)
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1.Does having been chased by zombies effect the post-training attitude rating towards zombies? (1 point)
a.Hypotheses:
i. Null hypothesis:
ii.Alternative Hypothesis:
b. Criterion
i. One tailed or two tailed?
ii.df =
iii. Critical value at .05 level:
c. Calculate:tobt =
Show formula and computations (using summary data from table above):
d. Determine significance
i. Reject or fail to reject the null hypothesis:
ii.If significant describe finding:
2. Calculate and interpret Cohen's d for effect size:
Calculate and interpret r2 for effect size:
Calculate the 95% confidence interval for the mean difference:
3. Perform the same independent samples t-test using JASP. Include the location parameter (including Confidence interval), effect size statistic, descriptives, and descriptives plots. Copy and paste the output from the JASP test below.