Math 111 exam 3 (8. 3 8. 6) You must show all appropriate work in order to receive full credit for an answer: before handing in your test: on your first answer sheet only, please copy the pledge and sign. Answers should be exact and in simplest form unless otherwise indicated. Please answer question 1 on answer page 1. 1. a. (16 points) let z be the standard normal random variable for parts (i) through (iv) below. [all answers should be number values. ] (i) find p(z < 2. 3). (ii) find p(z > 1. 14). (iii) find p( 0. 09 < z < 1). (iv) solve for b: p(z > b) = 0. 0017. Using this criterion, determine the probability that a person selected at random will have a fever. (iv) solve for t: p(body temperature < t) = 0. 1271. 2. a. (10 points) from past experience, a manufacturer knows that 20 out of a production run of 1000 computer chips will be defective in some way.
