Solution:-
Given that,
mean = = 250
standard deviation = = 20
Using standard normal table,
P(Z < z) = 5.5%
= P(Z < -1.59819 ) = 0.055
z = -1.59819
Using z-score formula,
x = z * +
x = -1.59819 * 20 + 250
x = 218.0361
A variable x has a normal distribution with a mean of 250 and a standard deviation...
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