For the sample of M=85

1.For the sample of M=85, a score of X=90 corresponds to z=0.50 what is the sample of standard deviation? 2. In a population of exam scores a scores if x=88 corresponds to z=+2.00 and a score of x=79 and corresponds to z=-1.00 find the mean and standard deviation for the population.Sketch the distribution and locate the two scores on the sketch. 3. a population of the following N=5 scores: 0,6,4,3, and 12 a) compute ? and ? for the populationb) find the z-score for each score in the populationc) transfer the original population into a new population of N=5 scores with a mean of ? =60 and a standard deviation of ?=8