Suppose x has a distribution with μ = 48 and σ = 3. Find P(44 ≤ x ≤ 49). (Round your answer to four decimal places.)
asked Nov 13, 2017 in Statistics Answers by anonymous

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1 Answer

Assume normal distribution.

Z1=(49-48)/3=0.333, Z2=(44-48)/3=-4/3=-1.333.

From tables P1=N(Z1)=0.6304, P2=N(Z2)=1-N(1.333)=1-0.9087=0.0913.

P1-P2=0.5391 or about 53.91%.

answered Nov 13, 2017 by Rod Top Rated User (581,240 points)

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