<prompt> The Hb level is healthy women has mean 13.5 gdl and standard detion 1.5 gdl, what is the Z score for a woman with Hb level 15.0 gdI -91021  <response>: Ans. is d i.e., 1.0 Thus the Z score for the woman in question is 1.0. Very simple funda to calculate Z score Normal variate indicates that the given observation is how many standard detion away from the mean. Here mean is 13.5 gc11, SD is 1.5 gdl and observation is 15 gdl. That means observation 15 gdl is 1 SD 1.5 gdl away from mean 13.5 gdl. So relative dete Z-score is 1. In same question, if we assume that the observed value is 16.5 mean - 2 SD that means relative dete is 2 as the observed value is 2 SD away from mean. 