For the data set below whitch one is true

Question

9,8,6,7,8,5,6,9,7,7

a) the equallaterial range is greater than the range

b)the range is five

c)the standard deviation is approximately 2.5.

d)the variance is 1.56.

Answer 1

The only one that is true is d)

N = 10

μ = 7.2

Var = σ² = 1.56

Std dev = σ = √1.56 = 1.249

The range is 9-5 = 4