Math Interactive Task 10

Select an answer from the options below and press Check Answer.

Which is the correct formula to use for STEP 2 in finding the standard deviation?

A.

the quantity of the mean minus x sub 1 squared plus the quantity of the mean minus x sub 2 squared plus the quantity of the mean minus x sub 3 squared plus the quantity of the mean minus x sub 4 squared plus the quantity of the mean minus x sub 5 squared plus the quantity of the mean minus x sub 6 squared plus ellipsis plus the quantity of the mean minus x sub n squared

B.

the quantity of the mean minus x sub n squared plus the quantity of the mean minus x sub n squared plus the quantity of the mean minus x sub n squared plus the quantity of the mean minus x sub n squared plus the quantity of the mean minus x sub n squared plus the quantity of the mean minus x sub n squared plus ellipsis plus the quantity of the mean minus x sub n squared

C.

the quantity of the mean minus x sub 2 squared plus the quantity of the mean minus x sub 4 squared plus the quantity of the mean minus x sub 6 squared plus the quantity of the mean minus x sub 8 squared plus the quantity of the mean minus x sub 10 squared plus the quantity of the mean minus x sub 12 squared plus ellipsis plus the quantity of the mean minus x sub n squared

Answer: Correct! Try again. Incorrect. The correct answer is A. Each data point is subtracted from the mean. Follow the pattern.