Answered: 4.40 The numbers of cars failing an…

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 4.40

Transcribed Image Text:2 R. Lyman Ott, Michael Longnecker - An Introduction to Statistical Methods and Data Analysis-Cengage (2016).pdf - Adobe Reader File Edit View Window Help 215 (228 of 1179) 100% Comment Share 4.38 Texting while driving is a very dangerous practice. An electronic monitoring device is installed on rental cars at a randomly selected rental franchise. Basic Bookmarks a. Is the number of times a randomly selected driver sends a text message during the first hour after leaving the rental company's parking lot a discrete or continuous Enter your search term W Contents random variable? b. Is the length of time the driver spends typing a text message while driving a discrete or continuous random variable? C. Is the brand of cell phone from which the text message is sent a discrete or continuous random variable? A car dealership uses a questionnaire to evaluate customer interactions with the dealer- P Preface I Statistics & Scientific Method Basic 4.39 ET Surveys & Experimental Studies to gather ship's salespersons. One of the items on the questionnaire was "Overall, the interaction with the salesperson was positive." The possible responses are Strongly agree, Agree, No opionion, Disa- gree, and Strongly disagree. a. Is the number of customers responding Strongly agree a continuous or discrete random variable? Data b. Is the proportion of customers responding Strongly agree a continuous or discrete +Y Data Description ET Probability & random variable? Probability Distributions 4.7 Probability Distributions for Discrete Random Variables 4.40 The numbers of cars failing an emissions test on randomly selected days at a state inspec- tion station are given in the following table. Gov. E P Inferences about Population Central Values y 1 2 3 4 6. 7 8 9 10 P(y) .100 .130 250 .160 .095 .075 .063 .047 .041 .024 .015 EP Inferences Comparing 2 Population Central a. Construct a graph of P(y). b. Compute P(y= 2). c. Compute P(y>7). d. Compute P(2 < y=7). Values + P Inferences about Bus. 4.41 A traditional call center has a simple mission: Agents have to answer customer calls fast and end them as quickly as possible to move on to the next call. The quality of service rendered by the call center was evaluated by recording the number of times a customer called the center Population Variances + P Inferences about back within a week of his or her initial call to the center. more than 2 y - number of recalls 1 2 3 4 5 6 Population Central P(y) 151 .232 354 .161 .067 .021 .014 Values ENG 11:56 PM P Type here to search 71°F IN 9/24/2021 近

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