Answer to Question #218595 in Statistics and Probability for Petra

Question #218595

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


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Expert's answer
2021-07-19T16:14:50-0400

μ=1250σ=120P(970<X<1320)=P(X<1320)P(X<970)=P(Z<13201250120)P(Z<9701250120)=P(Z<0.583)P(Z<2.333)=0.72000.0098=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 \\ = 0.7102


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