A data set has the following characteristics: mean: 4.9 median: 6 mode: 6 variance: 4 the z-score is the number of standard deviations a data value is away from the mean . using the formula below, calculate the z-score for the listed data points. z-score: zx = x ˆ’ î¼ ïƒ z1 = z5 = z6.5
a) 0.4
b) -1.1
c) 0
d) 1.6