STA 3033 Midterm: STA3033 Exam 2 Review Problems
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The following problems are related to the concepts covered in chapters 3 and 4. Make sure you review the class notes on these chapters before attempting the problems: suppose random variable x has the following probability distribution: x p(x) Y denotes the number of attempts on which the first success/failure occurs. 0268: what is the probability that the first failure occurs after the 20th attempt? x=21 x (0. 8) 1-(0. 804) = 0. 196: suppose we improve the quality of this modem so that it fails, on the average, 1 in every 1000 attempts. What is the approximate probability that we see no more than 4 failures among the next 4000 attempts? p = 1/1000 = 0. 001. C (4000, )(0. 001) (1 x 0 x. 0. 610558: a report indicates that 40% of the memory chips produced by a certain manufacturer are defective. 1- (0. 943)=0. 057: a computer monitor assembly line, produces a total of 20 monitors each day, of which 8 are.
