Intro to Stat_Part_13

# Intro to Stat_Part_13 - 53 d Construct a Venn Diagram Make...

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53 d. Construct a Venn Diagram. Make one group females and the other group heterosexual contact. Fill in all values as probabilities. Exercise 3.17 (Solution on p. 64.) The following table identiﬁes a group of children by one of four hair colors, and by type of hair. Hair Type Brown Blond Black Red Totals Wavy 20 15 3 43 Straight 80 15 12 Totals 20 215 Table 3.2 a. Complete the table above. b. What is the probability that a randomly selected child will have wavy hair? c. What is the probability that a randomly selected child will have either brown or blond hair? d. What is the probability that a randomly selected child will have wavy brown hair? e. What is the probability that a randomly selected child will have red hair, given that he has straight hair? f. If B is the event of a child having brown hair, ﬁnd the probability of the complement of B. g. In words, what does the complement of B represent? Exercise 3.18 A previous year, the weights of the members of the San Francisco 49ers and the Dallas Cowboys were published in the San Jose Mercury News . The factual data are compiled into the following table. Shirt# 210 211-250 251-290 290 1-33 21 5 0 0 34-66 6 18 7 4 66-99 6 12 22 5 Table 3.3 For the following, suppose that you randomly select one player from the 49ers or Cowboys. a. Find the probability that his shirt number is from 1 to 33. b. Find the probability that he weighs at most 210 pounds. c. Find the probability that his shirt number is from 1 to 33 AND he weighs at most 210 pounds. d.

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## This document was uploaded on 10/31/2011 for the course STA 2023 at University of Florida.

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Intro to Stat_Part_13 - 53 d Construct a Venn Diagram Make...

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