Homework1key

# Homework1key - Homework 1 (14 pts + 1 bonus) due Jan 21 (1...

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1 Homework 1 (14 pts + 1 bonus) due Jan 21 (1 pt. bonus) Q0. Why were the earrings that I wore to class today relevant to today's lecture The earrings that I wore are dice (clear 6 sided dice to be specific). (3 pts.) 1.4. The following table provides a frequency distribution (in thousands) for the number of rooms in U.S. housing units. Rooms 1 2 3 4 5 6 7 8+ No. Units 471 1,470 11,715 23,468 24,476 21,327 13,782 15,647 If a U.S. housing unit is selected at random, find the probability that it has Total number of units, Total = 471 + 1,470 + 11,715 + 23,468 + 24,476 + 21,327 + 13,782 + 15,647 = 112,356 a) four rooms. No of units with 4 rooms total = 23,468 112,356 =0.209 b) more than four rooms. No of units with 5 rooms and 6 rooms and 7 rooms and 8 or more rooms total = 24,476 + 21,327 + 13,782 + 15,647 112,356 = 75,232 112,356 =0.670 c) one or two rooms No of units with 1 room or 2 rooms total = 471 + 1,470 112,356 = 1,941 112,356 = 0.017 d) fewer than one room. Since all housing units have at least one room, this is the empty set, \ e) one or more rooms. Since all of the units have one or more rooms, this is the whole sample space or 1. f) Identify the population under consideration. The population is the housing units in the U.S.

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2 (1.5 pt.) 1.10. Use the frequentist interpretation of probability to interpret each statement. a) The probability is 0.314 that the gestation period of a woman will exceed 9 months.
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## This note was uploaded on 02/20/2012 for the course STAT 311 taught by Professor Staff during the Spring '08 term at Purdue.

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Homework1key - Homework 1 (14 pts + 1 bonus) due Jan 21 (1...

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