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 ? = 5.6 and standard deviation ? = 0.4....

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 ? = 5.6 and standard deviation ? = 0.4.

(b) Convert the
x
interval,
x
< 4.2,="" to="">
z
interval. (Round your answer to two decimal places.)

(d) Convert the
z
interval,
z
< −1.44,="" to="">
x
interval. (Round your answer to one decimal place.)

(e) Convert the
z
interval, 1.28
z, to an
x
interval. (Round your answer to one decimal place.)

Extracted text: 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 u = 5.6 and standard deviation o = 0.4. The Standard Normal Distribution (u = 0, o = 1) -2 68% of area 95% of area 99.7% of area