The principle of redundancy is used when system reliability is improved through redundant or backup components. Assume that a student's alarm clock has a12.2% daily failure rate. Complete parts (a) through (d) below.Ca. What is the probability that the student's alarm clock will not work on the morning of an important final exam?

Answered: The principle of redundancy is used…

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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Blood pressure: High blood pressure has been identified as a risk factor for heart attacks and strokes. The proportion of U.S. adults with high blood pressure is 0.20. A sample of 38 U.S. adults is chosen. Use Excel as needed. (a) Is it appropriate to use the normal approximation to find the probability that more than 43% of the people in the sample have high blood pressure? If so, find the probability. If not, explain why not.
Gabrielle has purchased the 2-year extended warranty from a retailer to cover the value of hers new cellphone in case if it gets damaged or becomes inoperable for the price of $25. Gabrielle's cellphone is worth $1400 and the probability that it gets damaged or becomes inoperable during the length of the extended warranty is estimated to be 4%. Let XX be the retailer's profit from selling the extended warranty. Answer the following questions: 1. Create the probability distribution table for XX : XX outcome profit xx ,$ P(X=x)P(X=x) the cellphone gets damaged or becomes inoperable no claim filed 2. Use the probability distribution table to find the following: E[X]=μX=E[X]=μX= dollars. (Round the answer to 1 decimal place.) SD[X]=σX=SD[X]=σX= dollars. (Round the answer to 1 decimal place.)
The mean percent of childhood asthma prevalence in 43 cities is 2.38%. A random sample of 33 of these cities is selected. What is the probability that the mean childhood asthma prevalence for the sample is greater than 2.7%? Interpret this probability. Assume that σ=1.31%.
Use the following probabilities to answer the question. Round to 4 decimal places.P(A)=0.42P(A)=0.42, P(B)=0.53P(B)=0.53, P(AandB)=0.05P(AandB)=0.05.P(B∣A)=
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Lindo is deciding which course she wants to take in her next college semester. The probability that she enrols in the statistics course is 0.30 and the probability that she enrols in an econometrics course is 0.70. The probability that she will enrol in statistics course Given that she enrols in econometrics course is 0.40. 1. What is the probability that she will enrol in both Stats course AND econometrics course? ANSWER
To generate leads for new business, Gustin Investment Services offers free financial planning seminars at major hotels in Southwest Florida. Gustin conducts seminars for groups of 25 individuals. Each seminar costs Gustin $3,400, and the commission for each new account opened is $4,900. Gustin estimates that for each individual attending the seminar, there is a 0.01 probability that he/she will open a new account. Determine the equation for computing Gustin's profit per seminar, given static values of the relevant parameters. Profit =(New accounts opened x _______)-_________ Construct a simulation model to analyze the profitability of Gustin's seminars. Would you recommend that Gustin continue running the seminars? (Use at least 1,000 trials. Round your answer to two decimal places.) What is the minimum number of attendees (in a multiple of five, i.e., 25, 30, 35, …) that Gustin needs before a seminar's average profit is greater than zero? =______ attendees
George is a big fan of music from the 1960s, and 22% of the songs on his iPod are Beatles songs. Suppose George sets his iPod to "shuffle," so that it selects songs randomly (assume the shuffle function permits repetition of songs). During a long drive, George plays 50 randomly selected songs. Calculate the probability that more than 30% of the 50 randomly selected songs are Beatles songs. Round your answer to four decimal places.
The figure below shows survival probabilities from all-cause mortality over 20 years in participants over 50 years of age who have normal glucose, glucose intolerance, and Type II diabetes mellitus. Estimate the 5-year survival probability for Type II diabetes. a. approximately 10% b. approximately 60% c. approximately 76% d. approximately 84%
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The following graph plots the fitted probabilities of default (y axis) depending on the credit balance (x axis) with the linear probability model (left) and the logistic model (right). Which alternative is NOT correct 500 1000 1500 2000 2500 500 1000 1500 2000 2500 Balance Balance O a. There will always be a balance level such that the probability of default according to the linear probability model is above 100% O b. The logit model supposes that the error term of the latent variable follows a logistic distribution O C. The linear probability model estimates probabilities of default below 0% Od. The probability of default lower than 50% is a frequent feature of linear probability models e. The logistic model estimates probabilities between 0% and 100% 00 80 90 YO 0 Probability of Default R'O 90 o zo o'o Probability of Default

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