Question

Find the z-score for the value 77 when the mean is 98, and the standard deviation is 6. Round to the nearest hundredth. a) z = -3.67 b) z = 0.72 c) z = -0.72 d) z = -3.50

Answer 1

Hi,

answer D: z=-3.50

`z=(x-\mu)/(\sigma) =(77-98)/(6) =\boxed{-3.50}`