SECTION 5.3 Normal Distributions: Finding Values 259 36. GRE Scores The test scores for the analytical writing section of the Graduate Record Examination (GRE) can be approximated by a normal distribution, as shown in the figure. (Source: Educational Testing Service) (a) What is the maximum score that can be in the bottom 10% of scores? (b) Between what two values does the middle 80% of the scores lie? 37. Red Blood Cell Count The red blood cell counts (in millions of cells per microliter) for a population of adult males can be approximated by a normal distribution, with a mean of 5.4 million cells per microliter and a standard deviation of 0.4 million cells per microliter. (a) What is the minimum red blood cell count that can be in the top 25% of counts? (b) What is the maximum red blood cell count that can be in the bottom 15% of counts