<span>The mean of a set of data is 148.87 and its standard deviation is 68.29. Find the z score for a value of 490.19 the z-score is given by: z=(x-</span>μ<span>)/</span>σ plugging in the values in the expression we get: z=(490.19-149.87)/68.29 z=340.32/68.29 z=4.9835
