Question

10. Find the indicated probability. (1 point) In a survey of 300 college graduates, 63% reported that they entered a profession closely related to their college major. If 9 of those survey subjects are randomly selected without replacement for a follow-up survey, what is the probability that 4 or fewer of them entered a profession closely related to their college major? O 0.207 O 0.0512 O 0.149 O 0.793 11. Solve the problem. (1 point) On a multiple choice test with 19 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the mean for the number of correct answers. 09.5 063 O 14.3 04.8 12. Solve the problem. (1 point) The probability that a radish seed will germinate is 0.7. A gardener plants seeds in batches of 8. Find the standard deviation for the number of seeds germinating in each batch. O1.7 O2.8 013 O 16.8 13. Solve the problem. (1 point) A company manufactures batteries in batches of 18 and there is a 3% rate of defects. Find the mean number of defects per batch. O 54 00.5 O 17.5 O 5.4

Answer 1

n=9, p=0.63 P[854 ] =P[x=0] + P(x=1] + P[x=2] P[x=3] telx=4] (10.033°20:31° +(?) 10-132*60-303 +(95) 60-637 10:31)| + (3) (0-6330-235 I 2 +(9) (0.63) "20.375 4 0.0001 +0.002oto.0136 to.0539 +0.1376 0. 207 n=1g P = 1 E (x2= np = 19 1 = 4.8 mean 14.8

Date n=8 , p=0.7 12) I Standard deviation = npcire) V 8X0-7X0.3 Standard deviation = 1.3 13] =18, p = 0.03 =18xo.03 = o.s . mean = 0.5