Statistics 13

Question

Please write answer beside the question. no explanation needed.

MarkLester · Answer

Step 1
the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2
standard normal distribution is a normal distribution with,
mean ( u ) = 13
standard deviation ( sd )= 4
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Step 2
to find P(a < = Z < = b) = F(b) - F(a)
P(X = 11) = (11-13)/4 
Z = -2/4 = -0.5
P(X = 13)  = (13-13)/4 
= 0/4 = 0
which is equal to the area under the normal curve between -0.5 to 0

Category:	Mathematics
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Statistics 13

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