statistics 1430913 2

1. For each of the following scenarios, compute the effect size and state whether it is approximately small, medium, or large.

a.       Participants in an inpatient study of treatment for OCD complete an anxious feelings inventory which is then compared to the general population. The sample mean is M = 27.2. The mean in the general population of inpatients on this inventory is M = 35.5, and the population standard deviation is 1.9.


b.      A mood assessment in a sample of 15 gym members has a mean of 87 and a standard deviation of 6. The mean in the general population on this measure is 79.

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