A second-stage smog alert has been called in a certain area of Los Angeles County in which there are 90 industrial firms. Aninspector will visit 20 randomly selected firms to check for violations of regulations.(a) If 27 of the firms are actually violating at least one regulation, what is the pmf of the number of firms visited by theinspector that are in violation of at least one regulation?O h(x; 20, 0.3)O nb(x; 20, 0.3)О Бx; 20, 27, 90)О Бix; 20, 0.3)O h(x; 20, 27, 90)nb(x; 20, 27, 90)(b) If there are 900 firms in the area, of which 270 are in violation, approximate the pmf of part (a) by a simpler pmf.O b(x; 20, 0.3)O b(x; 20, 270, 900)O h(x; 20, 0.3)O h(x; 20, 270o, 900)O nb(x; 20, 0.3)O nb(x; 20, 270, 900)(c) For X = the number that are in violation among the 20 visited out of 900 firms, compute E(X) and V(X) both for theexact pmf and the approximating pmf in part (b). (Round your answers to two decimal places.)Compute E(X) and V(X) for the exact pmf.E(X) =V(X) =Compute E(X) and V(X) for the approximating pmf.E(X) =V(X) =

A second-stage smog alert has been called in a certain area of Los Angeles County in which there are 90 industrial firms. A inspector will visit 20 randomly selected firms to check for violations of regulations. (a) If 27 of the firms are actually violating at least one regulation, what is the pmf of the number of firms visited by the inspector that are in violation of at least one regulation? O h(x; 20, 0.3) nb(x; 20, 0.3) b(x; 20, 27, 90) O b(x; 20, 0.3) h(x; 20, 27, 90) O nb(x; 20, 27, 90) (b) If there are 900 firms in the area, of which 270 are in violation, approximate the pmf of part (a) by a simpler pmf. O b(x; 20, 0.3)

A second-stage smog alert has been called in a certain area of Los Angeles County in which there are 90 industrial firms. A inspector will visit 20 randomly selected firms to check for violations of regulations. (a) If 27 of the firms are actually violating at least one regulation, what is the pmf of the number of firms visited by the inspector that are in violation of at least one regulation? O h(x; 20, 0.3) nb(x; 20, 0.3) b(x; 20, 27, 90) O b(x; 20, 0.3) h(x; 20, 27, 90) O nb(x; 20, 27, 90) (b) If there are 900 firms in the area, of which 270 are in violation, approximate the pmf of part (a) by a simpler pmf. O b(x; 20, 0.3)

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter10: Sequences, Series, And Probability

Section10.8: Probability

Problem 32E

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