A survey found that women's heights are normally distributed with mean 63.6 in. and standard deviation 2.4 in. The survey also found that men's heights are normally distributed with mean 67.1 in. and standard deviation 3.8 in. Most of the live characters employed at an amusement park have height requirements of a minimum of 55 in. and a maximum of 64 in. Complete parts (a) and (b) below. a. Find the percentage of men meeting the height requirement. What does the result suggest about the genders of the people who are employed as characters at the amusement park?
a)
Here, μ = 67.1, σ = 3.8, x1 = 55 and x2 = 64. We need to compute
P(55<= X <= 64). The corresponding z-value is calculated
using Central Limit Theorem
z = (x - μ)/σ
z1 = (55 - 67.1)/3.8 = -3.18
z2 = (64 - 67.1)/3.8 = -0.82
Therefore, we get
P(55 <= X <= 64) = P((64 - 67.1)/3.8) <= z <= (64 -
67.1)/3.8)
= P(-3.18 <= z <= -0.82) = P(z <= -0.82) - P(z <=
-3.18)
= 0.2061 - 0.0007
= 0.2054
= 20.54%
b)
This indicates that only 20.54% are employable however the
remaining requirements will be fulfilled by women.
Most of the people who are employed as characters at the amusement
park are women
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