A counselor records the number of disagreements (per session)among couples during group counseling sessions.If the number of disagreements is distributed normally as 4.4 0.4 (M SD)disagreements,then what proportion of couples disagree at least 4 times during each counseling session?
A).3413
B).1587
C).8413
D)The probability is not listed in the unit normal table.

Question

A counselor records the number of disagreements (per session)among couples during group counseling sessions.If the number of disagreements is distributed normally as 4.4  0.4 (M  SD)disagreements,then what proportion of couples disagree at least 4 times during each counseling session?
A).3413 
B).1587 
C).8413 
D)The probability is not listed in the unit normal table.

Quizplus · Accepted Answer

To find the proportion of couples that disagree at least 4 times during each counseling session, we need to find the area under the normal curve to the right of 4.

z = (X - μ) / σ
z = (4 - 4.4) / 0.4
z = -1

Using the standard normal distribution table, the area to the right of z=-1 is 0.8413. Therefore, the proportion of couples that disagree at least 4 times during each counseling session is 0.8413 or 84.13%. The closest option is C, which is the correct answer.

A Counselor Records the Number of Disagreements (Per Session)among Couples