Let x = red blood cell (RBC) count in millions percubic millimeter of whole blood. For healthy females, xhas an approximately normal distribution with mean μ = 5.2and standard deviation σ = 0.7.
(a) Convert the x interval, 4.5 < x, to az interval. (Round your answer to two decimalplaces.)
< z
(b) Convert the x interval, x < 4.2, to az interval. (Round your answer to two decimalplaces.)
z <Â Â
(c) Convert the x interval, 4.0 < x < 5.5,to a z interval. (Round your answers to two decimalplaces.)
< z <Â Â
(d) Convert the z interval, z < −1.44, to anx interval. (Round your answer to one decimalplace.)
x <Â Â
(e) Convert the z interval, 1.28 < z, to anx interval. (Round your answer to one decimalplace.)
< x
(f) Convert the z interval, −2.25 < z <−1.00, to an x interval. (Round your answers to onedecimal place.)
< x <Â Â
(g) If a female had an RBC count of 5.9 or higher, would that beconsidered unusually high? Explain using z values.
Yes. A z score of 1.00 implies that this RBC isunusually high.No. A z score of −1.00 implies that thisRBC is unusually low.     No. A zscore of 1.00 implies that this RBC is normal.
