Let X = Red Blood Cell (RBC) Count in Millions $\mu$

question 31

Multiple Choice

Let x = red blood cell (RBC) count in millions per cubic millimeter of whole blood. Suppose that for healthy females, x has an approximately normal distribution with mean $\mu$ = 4.7 and standard deviation $\sigma$ = 0.3 Convert the following x interval from a laboratory test to a z interval. 4.0 < x < 5.5

• A)11.67 < z < 14.00
• B)-4.00 < z < 14.00
• C)-4.00 < z < -1.67
• D)11.67 < z < 29.67
• E)14.00 < z < 27.33

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