I don't understand how to answer the question following the problem below. The question is identify the units that this patient’s red blood cell count standard score (-1.67) is measured in.Healthy females have a mean red blood cell count of 4.8 million cells per miroliter of whole blood with a standard deviation of 0.3 million cells per microliter and a mean white blood cell count of 7250 cells per microliter of whole blood with a standard deviation of 1375 cells per microliter. A female patient is given a blood test. Her red blood cell count was found to be 4.3 million cells per microliter while her white blood cell count was found to be 6100 cells per microliter.  After workin the formula I came up -1.67 for red blood cells and -.84 for white cell count. Now the question

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Asked Feb 26, 2020
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I don't understand how to answer the question following the problem below. The question is identify the units that this patient’s red blood cell count standard score (-1.67) is measured in.

Healthy females have a mean red blood cell count of 4.8 million cells per miroliter of whole blood with a standard deviation of 0.3 million cells per microliter and a mean white blood cell count of 7250 cells per microliter of whole blood with a standard deviation of 1375 cells per microliter. A female patient is given a blood test. Her red blood cell count was found to be 4.3 million cells per microliter while her white blood cell count was found to be 6100 cells per microliter.  

After workin the formula I came up -1.67 for red blood cells and -.84 for white cell count. Now the question 

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It is given that the patient’s red blood cell have a standard score of -1.67, z-score doesn’t take any particular unit of measurement but here it is 1.67 standa...

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