Anxiously-attached individuals in the general population tend to have low levels of satisfaction in their romantic relationships (μ = 10, σ = 5, positively skewed distribution). A therapist interested in increasing relationship satisfaction provides a week-long relaxation seminar to 11 anxious individuals. After completing the seminar, relationship satisfaction in the sample averages 12.
-What is the comparison distribution's standard deviation?
A)0.45
B)0.67
C)1.51
D)2.27

Question

Anxiously-attached individuals in the general population tend to have low levels of satisfaction in their romantic relationships (μ = 10, σ = 5, positively skewed distribution). A therapist interested in increasing relationship satisfaction provides a week-long relaxation seminar to 11 anxious individuals. After completing the seminar, relationship satisfaction in the sample averages 12.  
-What is the comparison distribution's standard deviation?
A)0.45
B)0.67
C)1.51
D)2.27

Quizplus · Accepted Answer

The comparison distribution's standard deviation is the standard error of the mean, which is calculated as the population standard deviation divided by the square root of the sample size. In this case, the population standard deviation is 5 and the sample size is 11, so the standard error of the mean is 5 / sqrt(11) = 1.51.

Anxiously-Attached Individuals in the General Population Tend to Have Low