Probalitiy and statistics Instructions: Read and answer the following problems systematically.Five computers will be delivered to a certain school for testing, but three of them are defective.The principal will get two of these computers for his office. Let X represent the random variablerepresenting the defective computers that will occur.1. Find the values of random variable X and complete the table below.X-NumberofProbability of(X) P(x)(x- Adefectivecomputers.25.5252. Find the mean, standard deviation, and variance of the given random variable. Show your solutionbelow,a. Mean(a)-b. Variance (o)-c. SD (a)=%3D

Given that Probability mass function of X is X=Number of defective computer P(X) 0 0.25 1…

Answered: Five computers will be delivered to a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Data on the cost (millions of dollars) and the running time (minutes) for films of a particular season are summarized in the computer output shown to the right and the plots below. Complete parts a and b Click the icon to view the plots. a) Check the assumptions and conditions for inference Select all that apply The residual plot and the scatterplot show consistent variability The scatterplot looks straight enough The residuals look random The residuals are nearly normal None of the assumptions and conditions for inference are satisfied. b) Find a 95% confidence interval for the slope and interpret it. m% confident that the cost of making longer movies (Round to two decimal places as needed. Use ascending order.) Dependent variable is: Budget(SM) squared-24.0% R s 25.12 with 20-2-18 degrees of freedom Variable Coefficient SE(Coeff) t-ratio P-value intercept -23.5882 Run Time 0.665602 0.2788 34.12 -0.69 0.4982 2.39 0.0282 at a rate of between and milion dollars per minute Plots 120 Run…
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Question 19 Lucille, Rocio, and Cristina are all taking College Mathematics but from different professors. They all recently took a statistics exam and the exam scores were normally distributed in each of their classes. • Lucille's class had an average grade of 77 and the standard deviation was 4. Lucille earned 84.2 on the exam. Rocio's class had an average grade of 85 and the standard deviation was 3. Rocio earned 85.6 on the exam. Cristina's class had an average grade of 85 and the standard deviation was 5. Cristina earned 91.5 on the exam. Since some professors give harder exams than others, these students decided to use statistics to figure out who did the best on their exam. Use the Cumulative Z-Score Table to answer the following questions. Write your answers as a percent with two decimal places. Hint • Lucille's score places her above % of her class. % of her class. Rocio's score places her above % of her class. • Cristina's score places her above Which person has the highest…

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