Is there a significant difference in reported pain between the two conditions? Use a two-tailed test with α = .01. Compute Cohen’s d to estimate the size of the treatment effect.
In the Chapter Preview we presented a study showing
that handling money reduces the perception pain
(Zhou, Vohs, & Baumeister, 2009). In the experiment,
a group of college students was told that they were
participating in a manual dexterity study. Half of the
students were given a stack of money to count and the
other half got a stack of blank pieces of paper. After
the counting task, the participants were asked to dip
their hands into bowls of very hot water (122°F) and
rate how uncomfortable it was. The following data
show ratings of pain similar to the results obtained
in the study.
Counting Money Counting Paper
7 9
8 11
10 13
6 10
8 11
5 9
7 15
12 14
5 10
- Is there a significant difference in reported pain
between the two conditions? Use a two-tailed test
with α = .01.
- Compute Cohen’s d to estimate the size of the
treatment effect.
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