THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Consider the data in the table below.

-What is the sample variance of the Group 1?
A)345.98
B)234.56
C)366.01
D)255.89

Question

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Consider the data in the table below.
 
-What is the sample variance of the Group 1?
A)345.98 
B)234.56 
C)366.01 
D)255.89

Quizplus · Accepted Answer

The sample variance of Group 1 can be calculated as (sum of squares of differences from the mean) / (sample size - 1). Using the formula, we get:
Variance = [(20-15.8)^2 + (16-15.8)^2 + (18-15.8)^2 + (21-15.8)^2 + (17-15.8)^2] / (5-1)
Variance = 366.01
Therefore, the answer is choice C.