Part IV: Question 2a-2b (Non-SPSS)

 

 

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

 

2-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 = 25.

The mean in the general population of inpatients on this inventory is m = 24.1,

and the population standard deviation is s = 1.3.  

Effect Size:

Answer

Work:

Small/Med/Large:

Answer

2-b)

A mood assessment in a sample of 15 gym members has a mean of M = 80.

The mean in the general population on this measure is m = 78.9 with a standard deviation of s = 3.1. 

Effect Size:

Answer

Work:

Small/Med/Large:

Answer

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