Question

What is the standard deviation for the data set?

138, 129, 145, 134, 142, 159, 153, 142, 127



Express your answer as a decimal to the nearest tenth.

Answer 1

Using a scientific calculator, the standard deviation is computed to be 10.5.

You can also use the formula for standard deviation √[Σ(x-ц)^2/n-1].
ц = (138 +129+145+134+142+159+153+142+127) /9 = 141
Σ(x-ц)^2 = 884
884/8 = 110.5
√110.5 = 10.5

Answer 2

Answer:

10.5

Step-by-step explanation: