Question: Z Scores: White blood cell count Let x = white blood cell (WBC) count per cubic millimeter of whole blood. Then x has a distribution that is approx. normal with mean µ = 7500 and standard deviation σ = 1750. Convert each of the following x intervals to z intervals.

1. 9000 < x
2. x < 6000
3. 3500 < x < 4500
   (e) Convert each of the following z intervals to x interval
   \[z\text{ }<\text{ }1.15\]
   (f) Convert each of the following z intervals to x intervals
   \[2.19\text{ }<\text{ }z\]
   (g) Convert each of the following z intervals to x interval
   \[0.25\text{ }<\text{ }z\text{ }<\text{ }1.25\]
   (h) If someone had a WBC count of 2500, would that be considered unusually high or low? Explain using z values and figure 7-19
   
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