MATH 111 Study Guide - Midterm Guide: Roundtail Chub, Random Variable, Standard Deviation

• School: University of Maryland
• Department: Mathematics
• Course: MATH 111
• Professor: All

Document Summary

Math 111 exam 3 (8. 3 8. 6) Note: while we"d like to guarantee that this answer key is 100% correct, there may be typos we missed in the proofreading. If you think an answer is wrong, check with your instructor or ta. 1. a. (16 points) let z be the standard normal random variable for parts (i) through (iv) below. 1. b. (24 points) in a 1992 study, researchers found that the mean length of roundtail chub in the salt and verde rivers was 377 cm with a standard deviation of 66 cm Assume that the researchers" observation is correct, and that the length of roundtail chub is normally distributed to answer parts (i) through (iv) below. [all answers should be number values. ] (i) what is the probability that a roundtail chub selected at random will have a length less than 300 cm? z.