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 = 4.7 and standard deviation o = 0.3. The Standard Normal Distribution (ee = 0, o = 1) -3 -2 2 68% of area 95% of area 99.7% of area (a) Convert the x interval, 4.5 < x, to a z interval. (Round your answer to two decimal places.) .67 < z (b) Convert the x interval, x < 4.2, to a z interval. (Round your answer to two decimal places.) z < 1.67 (c) Convert the x interval, 4.0 < x < 5.5, to a z interval. (Round your answers to two decimal places.) -2.33

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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 = 4.7 and standard deviation o = 0.3.
The Standard Normal Distribution
(ee = 0, o = 1)
-3
-2
2
68% of area
95% of area
99.7% of area
(a) Convert the x interval, 4.5 < x, to a z interval. (Round your answer to two decimal places.)
.67
< z
(b) Convert the x interval, x < 4.2, to a z interval. (Round your answer to two decimal places.)
z < 1.67
(c) Convert the x interval, 4.0 < x < 5.5, to a z interval. (Round your answers to two decimal places.)
-2.33
<z <2.67
(d) Convert the z interval, z < -1.44, to an x interval. (Round your answer to one decimal place.)
X < 6.26
(e) Convert the z interval, 1.28 < z, to an x interval. (Round your answer to one decimal place.)
6.71
Transcribed Image 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 = 4.7 and standard deviation o = 0.3. The Standard Normal Distribution (ee = 0, o = 1) -3 -2 2 68% of area 95% of area 99.7% of area (a) Convert the x interval, 4.5 < x, to a z interval. (Round your answer to two decimal places.) .67 < z (b) Convert the x interval, x < 4.2, to a z interval. (Round your answer to two decimal places.) z < 1.67 (c) Convert the x interval, 4.0 < x < 5.5, to a z interval. (Round your answers to two decimal places.) -2.33 <z <2.67 (d) Convert the z interval, z < -1.44, to an x interval. (Round your answer to one decimal place.) X < 6.26 (e) Convert the z interval, 1.28 < z, to an x interval. (Round your answer to one decimal place.) 6.71
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