4.1. A random sample size, n, is to be taken from a 4.6.large population having a standard deviation of1". The sample size is to be determined so thatthere will be a .05 risk probability of exceedinga 0.1" tolerance error in using the sample meanto estimate u. Which of the following values isnearest the required sample size?4.3.a. 42b. 1064.2. Assume that equipment A has a mean life of 100hours and an exponential distribution of timesto failure. Another system, equipment B has anormal distribution of times to failure with amean of 100 hours and a standard deviation of40 hours. If one or more of the systems is to beused for a 10 hour mission and the probabilityof non-failure during the mission must beestimated for each system, one will find that:4.4.c. 203d. 384a. Equipment A has a higher probability ofsuccessb. Equipment B has a higher probability ofsuccessc. Equipment A and B have the same.probability of successd. Insufficient information exists to answer thisquestionIf the probability that a train will arrive early at astation is 0.23 and the probability that the trainwill arrive late at the station is 0.18, what is theprobability that the train will arrive either earlyor late?a. 0.0414b. 0.05c. 0.41d. 0.59If a new car has, on average, 25 minor defects,what is the probability that the next new car willcontain exactly 25 minor defects?a. 50%b. 25%c. 10%d. 8%4.5 The variations which the normal distributioncurve describes are due to:a. Nonassignable causes.b. Catastrophic failurec. Assignable causesd. Degradation failures4.7. Given:4.8.a. Mann-Whitneyb. Kruskal-Wallisc. Mood's mediand. One-way ANOVA4.9.Which of the following tests assume someknowledge of a known distribution?Then for x = 0, 1, 2, ... f(x) is:f(x) =e-5 5xX!a. An exponential pdfb. A Poisson pdfc. An exponential cdfd. A Poisson cdfa. eb. -12.5AC. 13Ad.PageThe hazard-rate function, h(t), for a device isgiven by:Dift <0h(t)-Alf Osts 1At if 1 <1 ≤ 5The correct expression for R(t) =>1For the Weibull distribution, as the scaleparameter decreases:MacBook Aira. The Weibull is equivalent to the exponentialb. The location parameter approaches zeroc. The probability density function stretches tothe rightd. The probability density functioncompressed to the leftis4.10. When finding a confidence interval for mean p,based on a sample size of n:a. Increasing n increases the intervalb. Having to use Sx instead of n decreases theintervalc. The larger the interval, the better theestimate of ud. Increasing n decreases the interval> ofCONCEPTSSTATISTICAL

Given: σ=1α=0.05Zα/2=1.96E=0.1

A random sample size, n, is to be taken f large population having a standard deviat 1". The sample size is to be determined there will be a .05 risk probability of exce a 0.1" tolerance error in using the sample- to estimate u. Which of the following val nearest the required sample size?

A random sample size, n, is to be taken f large population having a standard deviat 1". The sample size is to be determined there will be a .05 risk probability of exce a 0.1" tolerance error in using the sample- to estimate u. Which of the following val nearest the required sample size?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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