MAT 2377 Final: MATH 2377 FinalSpring2011Sol
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Final exam for mat 2377 3x (spring 2011) Multiple choice questions: solve n h z. We need n = 40 observations: let x be the number of uorescent lights that have a useful life of at least 500 hours among n = 20. X has a binomial distribution with n = 20 and p = 0. 9. P (x 18) = 0. 6083: since (x 10)/(s/ 15 has a t distribution with = 14 degrees of freedom, then c = t. 14 = 1. 761: a 95% con dence interval for the true proportion of helmets of this. = [0. 227; 0. 493: let x be the weight (in ounces) of a box. P (x < 12) = (cid:18)12 12. 2. 1: see question 7 of assignment 1, let a be the event that the part has a coarse edge condition and b that the depth of bore is above target. 25: p (a b) = 20/200 = 0. 1, but p (a)p (b) = (45/200)(110/200) 6=
