The standard deviation of the scores: 2,0,1,8,and 4 is
A)0)67
B)2)83
C)3
D)8

Question

Quizplus · Accepted Answer

The standard deviation can be calculated by first finding the mean of the scores, which is (2+0+1+8+4)/5 = 3. Then, subtract the mean from each score and square the differences: (-1)^2, (-3)^2, (-2)^2, (5)^2, (1)^2. The sum of these squared differences is 30. Divide the sum by the number of scores (5) to get the variance, which is 6. Finally, take the square root of the variance to get the standard deviation, which is approximately 2.83. Therefore, the best choice is B.

The Standard Deviation of the Scores: 2,0,1,8,and 4 Is