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assume a normal distribution with a mean of 65 and standard deviation of 14 find P(56<X...

assume a normal distribution with a mean of 65 and standard deviation of 14 find P(56<X less than or equal to 68)

Solutions

Expert Solution

Solution:

Given: X ~ Normal

Find:

Find z score for x = 56 and for x = 68

Thus we get:

Look in z table for z = 0.2 and 0.01 as well as for z = -0.6 and 0.04 and find corresponding area.

P( Z< 0.21 ) = 0.5832

and

P( Z <-0.64) = 0.2611

Thus

milcah answered 11 months ago
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