Incorrect

The question was:The pain ratings are more variable in

Your Answer: The placebo (control) condition

Answer and explanation: Your answer is incorrect. The correct answer is The treatment condition.
The pain ratings are more variable in the treatment condition. This can be seen by both the range and the standard deviation. The range for the treatment group is 10 and the range for the control group is 6 as can be seen by the minimum and maximum scores. The standard deviation for the treatment group is 3.14 and for the control group is 1.86. Both the range and the standard deviation of the treatment group are bigger showing there is great variation in the spread of the score. This can also be seen on the histograms.


Statistic

Treatment

Control

N

29

21

Mean

4.3793

8.4286

Median

4.0000

9.0000

Trimean

4.0000

9.0000

Minimum

0.0000

4.0000

Maximum

10.0000

10.0000

25th Percentile

2.0000

8.0000

75th Percentile

6.0000

10.0000

Standard Deviation

3.1443

1.8593

Standard error of mean

0.5893

0.4057

Skew

0.5037

-0.9610

Kurtosis

-0.7375

-0.2728



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