Question 13:
= 63.8
= 2
To find P(X>65):
Z = (65 - 63.8)/2 = 0.6
Table of Area Under Standard Normal Curve gives area = 0.2257
So,
P(X>65) = 0.5 - 0.2257 = 0.2743
Question 14:
To find P(62 < X< 64):
Case 1:
For X from 62 tomid value:
Z = (62 - 63.8)/2 = - 0.9
Table gives area = 0.3159
Case 2: X from mid value to 64:
Z = (64-63.8)/2
= 0.1
Table gives area = 0.0398
So,
P(62 < X< 64) = 0.3159 + 0.0398 = 0.3557
According to the National Center for Health Statistics (2009), the average height for an adult female...
According to the National Center for Health Statistics, the mean height for adult women is μ=63.8 inches, with a standard deviation of σ=2.8 inches. Find the proportion of adult women taller than 5’4”. Write as a decimal and round to the nearest hundredth.
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