A psychologist treats 16 patients and records the number of sessions required to complete a behavioral therapy treatment for each patient.She computes SS = 800.Assuming the 16 patients constitute all patients under her care (so the population of her patients),what is the standard deviation for these data?
A) 53.3 sessions
B) 50 sessions
C) 7.1 sessions
D) 7.3 sessions

Question

Quizplus · Accepted Answer

To find the standard deviation, we first need to find the variance.

Variance = SS/(n-1) = 800/(16-1) = 800/15 = 53.33

The standard deviation is the square root of variance:

Standard deviation = Sqrt(53.33) = 7.28, which rounds off to 7.1 sessions.

Therefore, the best choice is C) 7.1 sessions.

A Psychologist Treats 16 Patients and Records the Number of Sessions