Test II Solution - Statistics for Engineers | STAT 4705, Exams of Statistics

Download Test II Solution - Statistics for Engineers | STAT 4705 and more Exams Statistics in PDF only on Docsity! SO STAT 4705 Test I March 8, 2000 a Name _ Row | Seat 1L, Suppose that a lot of 5,000 electrical fuses contains 5% defectives. If a sample of 20 fuses are randomly selected from this lot, find the probability that a) at least 3 defectives will be observed. P(x23) 3(- O(K 43) = Ie & p (<j 8) 2/4232 * 5768 x23 , / 1 (oso) qnce AD = x 1-FR) i 1- 4199 = 0808 b) at most 5 defectives will be observed. : - - » 3 7% »5)7, 6/60 P(« <3) & ple; 5) > pees! > Fs) ~ 1994 £ : \ yao es 250! px25) 2 Cx, Soom, sho 2 4 woo 7 xe 2, If 40% of the people of a certain population have blood type A, find the probability that in sequential testing of randomly selected people, a} the first person with type A blood is found on the fourth test. . Si, aif ayn 4 ve #4, 44) (5) C4) (6) ( b) the third person with type A blood is found on the fifth test. «6, 3.4) (eve) | a (0 a ean ft