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Test 2 with Answer Key - Basic Statistics I | MATH 1020, Exams of Statistics

Xavier University of Louisiana (XULA)Statistics
Prof. Thomas C. Palfrey

Material Type: Exam; Professor: Palfrey; Class: Basic Statistics I; Subject: Mathematics; University: Xavier University of Louisiana; Term: Spring 2010;

Typology: Exams

2009/2010

Uploaded on 04/25/2010

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Gy C wed Palfrey Statistics 1020 Test 2 March 8, 2010 Name. 1. 300 students were surveyed. 120 have a car 140 have a CD player Assume thai having a car is independent of having a CD player. (15 pts) Find the probability that a student surveyed has x= Te a.acaranda CD player. _ & quryat? ” b. acaroraCD player ©. 984° 5 “a ne {fo . c. has neither a car nor a cD player. — A [ / ay ¢ N 2. An urn has 3 red balls, 4 blue balls and 5 green balls. Pick a ball. Replace it. Pick another ball. Find the probability of getting: (20 points) a. onc red and one blue ball. / Io oie) ¥ (DO NOT SIMPLIFY!!!5 {2 b. two red balls. /|6 *(y)° v c, two green balls given that you picked 2 balls of the same color. 3, For the following probability distribution (10 pts) 7 XxX Prob. a. Find the mean. | =< 0 4 1 b. Find the variance. La hoe mh