The weekly wages of employees of Volta gold are normally distributed about a mean of$1,250 with a standard deviation of $120. Find the probability of an employee having a weekly wages lying between$1,320 and $970
μ=1250σ=120P(970<X<1320)=P(X<1320)−P(X<970)=P(Z<1320−1250120)−P(Z<970−1250120)=P(Z<0.583)−P(Z<−2.333)=0.7200−0.0098=0.7102\mu=1250 \\ \sigma=120 \\ P(970<X<1320) = P(X<1320) -P(X<970) \\ = P(Z< \frac{1320-1250}{120}) -P(Z< \frac{970-1250}{120}) \\ = P(Z< 0.583) -P(Z< -2.333) \\ = 0.7200 -0.0098 \\ = 0.7102μ=1250σ=120P(970<X<1320)=P(X<1320)−P(X<970)=P(Z<1201320−1250)−P(Z<120970−1250)=P(Z<0.583)−P(Z<−2.333)=0.7200−0.0098=0.7102
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