Find sd.
-The differences between two sets of dependent data are -3, -12, -3, -9, -27. Round to the nearest tenth.
A) 19.8
B) 12.9
C) 9.9
D) 7.9

Question

Quizplus · Accepted Answer

To find the standard deviation (sd) of the differences, first calculate the mean of the differences: (-3 - 12 - 3 - 9 - 27) / 5 = -10.8. Then, find the squared differences from the mean, average them, and take the square root: sqrt(((7.8)^2 + (-1.2)^2 + (7.8)^2 + (1.8)^2 + (16.2)^2) / 5) = 9.9.

Find Sd. -The Differences Between Two Sets of Dependent Data Are -3