Question

IX. USE THE INFORMATION BELOW TO ANSWER PROBLEMS 29 & 30 In a transfer level math class at CSM the 15 of the 23 students passed the course. You have to take that class too and are interested in establishing a 90% confidence interval for the true proportion of students expected to pass the class. 29. Choose the best answer below concerning a 90% confidence interval for the true average in this transfer level math course CSM. P(1-1) a) p+z b) c) d) e) Can't answer this question based on the information None of the above. 30. Choose the appropriate interval from below for the 90% confidence interval, rounded to 4 decimal places when necessary, for the true proportion of students expected to pass this transfer level math course at CSM. a) (0.4817,0.8227) b) (0.5249, 0.7795) (0.4888, 0.8155) d) Can't answer this question based on the information e) None of the above. Leave

Answer 1

Answer:- 29 ) a

30) c

Solution:-

Solution- math class at CSM, 15 of the 23 pay the course. therefore, ☆ = propoution of students pan the Course 15723 = 0:6.522 therefoile, 90.7. confidence interval given as tot Z A LA [ where, value of 2 at 9oy. Confidence 1.G4S, Coefficient us h =23 de te 0.6522

» 0.6522 I 1:645 -0.6522 x 0.3478 23 0.6522 1.645 0.22633516 23 = 0.6522 I 1.640 x0.0993 ) 0.6 522 +0.1633 0.4889.0-8155 1.2 2 0.4888., 0.8155) (nearly). cal value û rounded to 4 decimal place) Answey @ $ + 2/Blous 30 © (0.4888, 0-8155