a set of 50 data values has a mean of 22 and a variance of 16.I. Find the standard score (z) for a data value = 14\' II. Find the probability of a data value < 14. Please show step by step and show all work. Solution mean = 22 variance = 16 standard deviation = 16 = 4 1) standard score (z) for a data value = 14 is ( 14 - 22 ) /4 = -2 2) probability of a data value < 14. = 0.0228 http://homes.cs.washington.edu/~jrl/normal_cdf.pdf.