A second-stage smog alert has been called in a certain area of Los Angeles County in which there are 90 industrial firms. An inspector will visit 30 randomly selected firms to check for violations of regulations.(a) If 36 of the firms are actually violating at least one regulation, what is th nmf of the number of firms visited by the inspector that are in violation of at least one regulation?O Пx; 30, 0.4)O nb(x; 30, 0.4)O h(x; 30, 36, 90)О Бх;B 30, 0.4)O nb(x; 30, 36, 90)О Бх; 30, 36, 90)(b) If there are 900 firms in the area, of which 360 are in violation, approximate the pmf of part (a) by a simpler pmf.О hix; 30, 360, 900)O nb(x; 30, 0.4)O b(x; 30, 0.4)O nb(x; 30, 360, 900)O h(x; 30, 0.4)О Бix; 30, 360, 900)(c) For X = the number that are in violation among the 30 visited out of 900 firms, compute E(X) and V(X) both for the exact pmf and the approximating pmf in part (b). (Round your answers to two decimalplaces.)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)

Introduction: Denote the random variable X as the number of firms violating at least one of the…

Answered: A second-stage smog alert has been…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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the following table shows the average number of colds per year for a certain group of people by age group. calculate the average number of colds for all the people to the nearest one-hundreth.
The management of the local zoo wants to know if all of their animal exhibits are equally popular. If there is significant evidence that some of the exhibits are not being visited frequently enough, then changes may need to take place within the zoo. A tally of visitors is taken for each of the following animals throughout the course of a week, and the results are contained in the following table. At a = 0.025, determine whether there is sufficient evidence to conclude that some exhibits are less popular than others. Animal Exhibits at the Zoo Elephants Lions/Tigers Giraffes Zebras Monkeys Birds Reptiles Number of 164 166 172 188 165 139 142 visitors Copy Data Step 4 of 4: Draw a conclusion and interpret the decision. Next Prev 国 Tables E Keypad Answer Keyboard Shortcuts We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that some exhibits are less popular than others. We fail to reject the null hypothesis and conclude…
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