A recent poll suggests that 48% of Americans are satisfied with their job. You have a company with 279 employees and a poll suggests that 112 of them are satisfied (quite a bit less than 48%).Use the normal approximation to the binomial distribution to estimate the probability of randomly selecting 279 employees with 112 or fewer of them satisfied with their jobs.(a) Find the mean. [ ](b) Find the standard deviation. [ ](c) Find the z-score. [ ](d) Find the probability. [ ]

A recent poll suggests with their job. You have and a poll suggests tha bit less than 48%). Use the normal approxi to estimate the probabi employees with 112 or f jobs. (a) Find the mean. 0 (b) Find the standard de 0 (c) Find the z-score. 0 (d) Find the probability.

A recent poll suggests with their job. You have and a poll suggests tha bit less than 48%). Use the normal approxi to estimate the probabi employees with 112 or f jobs. (a) Find the mean. 0 (b) Find the standard de 0 (c) Find the z-score. 0 (d) Find the probability.

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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Question

A recent poll suggests that 48% of Americans are satisfied with their job. You have a company with 279 employees and a poll suggests that 112 of them are satisfied (quite a bit less than 48%).

Use the normal approximation to the binomial distribution to estimate the probability of randomly selecting 279 employees with 112 or fewer of them satisfied with their jobs.

(a) Find the mean.
[ ]

(b) Find the standard deviation.
[ ]

(c) Find the z-score.
[ ]

(d) Find the probability.
[ ]

Expert Solution

Step 1: Given that

Number of trail n=279

Probability of success p=0.48

X~Bin(n,p)

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