Stat HW Solutions

# Stat HW Solutions - STATW1211.005 TR 02:40P-03:55P Prof...

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STATW1211.005 Prof. Zhang TR 02:40P-03:55P Homework 1 – Solutions Textbook: Probability and statistics for engineering and the sciences (7 th edition) by Jay L. Devore Chapter 1: Question 39 a. so ; b. 1.394 can be decreased until it reaches 1.011(the largest of the 2 middle values) – i.e. by 1.394 – 1.011 = .383, If it is decreased by more than .383, the median will change. Question 68 a. b. Chapter 2: Question 5 a. Outcome Number Outcome 1 111 2 112 3 113 4 121 5 122 6 123 7 131 8 132 9 133 10 211 11 212 12 213 13 221 14 222 15 223 16 231 17 232 18 233 19 311 20 312 21 313 22 321 23 322 24 323 25 331 26 332 27 333

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STATW1211.005 Prof. Zhang TR 02:40P-03:55P b. Outcome Numbers 1, 14, 27 c. Outcome Numbers 6, 8, 12, 16, 20, 22 d. Outcome Numbers 1, 3, 7, 9, 19, 21, 25, 27 Question 24 Since A is contained in B, then B can be written as the union of A and (B A ), two mutually exclusive events. (See diagram). From Axiom 3, P[A
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## This note was uploaded on 01/31/2012 for the course STAT 1211 taught by Professor Hernandez during the Spring '08 term at Columbia.

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Stat HW Solutions - STATW1211.005 TR 02:40P-03:55P Prof...

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