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

Multiple Choice

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 corresponding Z score for the sample's mean score on the comparison distribution?

A) 0.66
B) 1.32
C) 0.44
D) 1.74