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MGTOP 215 Chapter 3-4 problems

by: Megan Lester

MGTOP 215 Chapter 3-4 problems MGTOP 215

Marketplace > Washington State University > MGTOP 215 > MGTOP 215 Chapter 3 4 problems
Megan Lester
GPA 2.8

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Chapter 3-4 problems from book
Business Statistics
Sung Ahn
Class Notes
25 ?




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This 3 page Class Notes was uploaded by Megan Lester on Wednesday September 28, 2016. The Class Notes belongs to MGTOP 215 at Washington State University taught by Sung Ahn in Fall 2015. Since its upload, it has received 3 views.


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Date Created: 09/28/16
3.27 The following is a set of data from a sample of n=7 12 7 4 9 0 7 3 a.) Compute the first quartile, the third quartile, and the interquartile range ???? + 1 7 + 1 ????1= 4 = 4 = 2 ????1= 3 ???? = 3(7 + 1) = 6 3 4 ???? 3 7 Interquatile range= 7 − 2 = 5 b.) List the five-number summary 0, 3, 7, 7, 12 c.) Construct a boxplot and describe its shape 0 2 4 6 8 10 12 d.) Compare your answer in (c) with that from Problem 3.3 (d) on page 117. Discuss 4.2 An urn contains 12 red balls and 8 white balls. One ball is to be selected from the urn a.) Give an example of a simple event A red ball is selected from the urn. b.) What is the complement of the red ball? Selecting the white ball. c.) What does the sample space consist of? Selecting the white or the red any time a ball is selected from the urn. 4.17 Consider the following contingency table: B B’ A 10 30 A’ 25 35 What is the probability of: a.) A⃒B? P A and B) P(A⃒B) = P B) 10 + 30 + 25 + 35 = 100 10 1 P A and B = = 100 10 10 + 30 4 P B = = 100 10 1 P A⃒B =) 10= 1 4 4 10 b.) A’⃒B’? P A′ and B′ =35 = .35 100 30 + 35 P B′ = = .65 100 P A′⃒B′ = .35= 0.54 .65 c.) A⃒B’? 30 3 P A and B′ = = 100 10 30 + 35 P B′ = = .65 100 3 P A⃒B′ =) 10= 0.46 .65 d.) Are events A and B independent? A and B are not independent 4.25 a.) Suppose that the respondent chosen is a female. What is the probability that she does not enjoy shopping for clothing? P(A⃒B) = P A and B P B) P no and female = 276 = 0.257 1085 543 P female = 1085 = 0.500 0.257 P(no⃒female) = 0.500 = 0.5.14 b.) Suppose that the respondent chosen enjoys shopping for clothing. What is the probability that the individual is a male? P A and B) P(A⃒B) = P B) 238 P yes and male = = 0.219 1085 P male = 542 = 0.4995 1085 0.219 P(yes⃒male) = = 0.438 0.4995 c.) Are enjoying shopping for clothing and the gender of the individual independent? Explain. P yes = 514 = 0.4.73 1085 The two events are not independent Because: if P(yes⃒male) = P yes , the two are independent If P(yes⃒male) ≠ P yes , the two are not independent


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