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Get Full Access to Probability And Statistical Inference - 9 Edition - Chapter 2.4 - Problem 9e
Get Full Access to Probability And Statistical Inference - 9 Edition - Chapter 2.4 - Problem 9e

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# Suppose that the percentage of American drivers who are

ISBN: 9780321923271 41

## Solution for problem 9E Chapter 2.4

Probability and Statistical Inference | 9th Edition

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Problem 9E

Suppose that the percentage of American drivers who are multitaskers (e.g., talk on cell phones, eat a snack, or text message at the same time they are driving) is approximately 80%. In a random sample of n = 20 drivers, let X equal the number of multitaskers.

(a) How is X distributed?

(b) Give the values of the mean, variance, and standard deviation of X.

(c) Find the following probabilities: (i) P(X = 15),

(ii) P(X > 15), and (iii) P(X ≤ 15).

Step-by-Step Solution:

Solution :

Step 1 of 3:

The percentage of american drivers who are multitaskers is approximately 80%. If a random sample of n=20 multitaskers are taken, and X denote the number of multitaskers. We have to find

(a) distribution of X

(b) mean, variance, standard deviation

(c) The probabilities (i) P(X = 15),

(ii) P(X > 15), and (iii) P(X ≤ 15).

Step 2 of 3

Step 3 of 3

##### ISBN: 9780321923271

This full solution covers the following key subjects: multitaskers, Drivers, american, deviation, distributed. This expansive textbook survival guide covers 59 chapters, and 1476 solutions. Since the solution to 9E from 2.4 chapter was answered, more than 1097 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Probability and Statistical Inference , edition: 9. The full step-by-step solution to problem: 9E from chapter: 2.4 was answered by , our top Statistics solution expert on 07/05/17, 04:50AM. Probability and Statistical Inference was written by and is associated to the ISBN: 9780321923271. The answer to “Suppose that the percentage of American drivers who are multitaskers (e.g., talk on cell phones, eat a snack, or text message at the same time they are driving) is approximately 80%. In a random sample of n = 20 drivers, let X equal the number of multitaskers.(a) How is X distributed?(b) Give the values of the mean, variance, and standard deviation of X.(c) Find the following probabilities: (i) P(X = 15),(ii) P(X > 15), and (iii) P(X ? 15).” is broken down into a number of easy to follow steps, and 79 words.

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