N=600μ=30000σ=6000
Is it justifiable to exclude homemakers’ value creation from national income?
P(20000<X<34000)=P(X<34000)−P(X<20000)=P(Z<600034000−30000−P(Z<600020000−30000)=P(Z<0.666)−P(Z<−1.666)=0.7476−0.0478=0.6998
Probability that a monthly income is more than 32,000
P(X>32000)=1−P(X<32000)=1−P(Z<600032000−30000)=1−P(Z<0.3333)=1−06304=0.3696
How many people Expected to have the income between 20,000 and 34000
Number of people =N×P(20000<X<34000)
=600×0.6998=419.88≈420
What is the probability that the monthly income is less than 24,000
P(X<24000)=P(Z<600024000−30000)=P(Z<−1)=0.1586
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