SIE 305 Fall 2017 Exam 2 Student Name Section 1 (60 points) Answ Mark your answe
ID: 2929544 • Letter: S
Question
SIE 305 Fall 2017 Exam 2 Student Name Section 1 (60 points) Answ Mark your answer on the otherwise you will not receive any credit for that qu points. Show all of your work while can be given partial credit when appropriate. Date: er the following 10 True/False or multiple choice questions. answer per question, working on each question so that incorrect answers cover page answer sheet. Please, only one estion. Each question is worth 6 1.) Suppose that, period. What is the probability that there will be 3 tornados next year? , on average, there are 5 tornados per year in Kansas during a 1-year average, a. 8.42% b. 9.16% c. 12.21% d. 14.04% e. None of the above 2.) Each of 15 refrigerators of a certain type has been returnmed to a distributor because of the presence of a high-pitched oscillating noise when the refrigerator is ru nning. Suppose that 5 of these 15 have defective compressors and the other 10 have less serious problems. If they are examined in random, order, let X = the number among the first 6 examined that have a defective compressor. What is the probability of one of the 6 having a defective compressor? a. 0.114 b. 0.252 c. 0.379 d. 0.420 e. None of the above 3.) X is the time in hours required to find a bug in a software system. Assupe that X is normally distributed with mean of 3 and standard deviation of 5? What is the probability that a bug will take less than 14 hours to correct? a. 1.39% b. 3.59% c. 96.41% d. 98.61% e. None of the above 4) 28% of all telephones of a certain type are submitted for service while under warranty. Of these, 52% can be repaired whereas the remaining must be replaced under warranty. If a company purchases 10 of these telephones, what is the probability that exactly 2 will end up under warranty? a. 0.215 b. 0.232 c. 0.256 d. 0.271 e. None of the aboveExplanation / Answer
Ans 1 .d
P(X=3)=0.1403 = 14.04%
PS: We are directed to solve only 1st question if multiple questions are posted
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