The ages of all the patients in the isolation ward of the hospital are 38, 26, 13, 41 and 22. What is the population variance?
A) 106.8
B) 91.4
C) 240.3
D) 42.4
E) None of the choices are correct.

Question

Quizplus · Accepted Answer

To find the population variance, first calculate the mean: (38 + 26 + 13 + 41 + 22) / 5 = 28. Then, find the squared differences from the mean: (38-28)², (26-28)², (13-28)², (41-28)², (22-28)². These are 100, 4, 225, 169, and 36 respectively. The average of these squared differences is (100 + 4 + 225 + 169 + 36) / 5 = 106.8.

The Ages of All the Patients in the Isolation Ward