z Scores: Red Blood Cell Count Let x red blood cell (RBC)

Chapter , Problem 9

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z Scores: Red Blood Cell Count Let x red blood cell (RBC) count in millions per cubic millimeter of whole blood. For healthy females, x has an approximately normal distribution with mean m 4.8 and standard deviation s 0.3 (based on information from Diagnostic Tests with Nursing Implications, edited by S. Loeb, Springhouse Press). Convert each of the following x intervals to z intervals. (a) 4.5 x (b) x 4.2 (c) 4.0 x 5.5 Convert each of the following z intervals to x intervals. (d) z 1.44 (e) 1.28 z (f) 2.25 z 1.00 (g) If a female had an RBC count of 5.9 or higher, would that be considered unusually high? Explain using z values and Figure 6-15. 10

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