1-20chapter stats

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Unformatted text preview: 21. Determine whether the two events are mutually exclusive An unmarried person and a person with an employed spouse A. Mutually exclusive B. Not Mutually exclusive 122. Determine whether the two events are mutually exclusive Someone born in the United States and a US citizen A. Mutually exclusive B. Not Mutually exclusive 1-269 Chapter 01 - An Introduction to Business Statistics 123. Determine whether the two events are mutually exclusive A voter who favors gun control and a conservative voter A. Mutually exclusive B. Not Mutually exclusive 124. Determine whether the two events are mutually exclusive A voter who is a registered Democrat and a voter who favors a Republican candidate A. Mutually exclusive B. Not Mutually exclusive 125. In a recent survey of homes in a major Midwestern city, 10% of the homes have a fax machine and 52% have a personal computer. Suppose 91% of the homes with a fax machine also have a personal computer. What percent of homes have a fax machine and a personal computer? A. 5.2% B. 91% C. 52% D. 9.1% E. 10% 126. In a recent survey of homes in a major Midwestern city, 10% of the homes have a fax machine and 52% have a personal computer. Suppose 91% of the homes with a fax machine also have a personal computer. What is the probability that a home has a fax machine or a personal computer? A. .62 B. .52 C. .53 D. .91 E. .09 1-270 Chapter 01 - An Introduction to Business Statistics 127. In a recent survey of homes in a major Midwestern city, 10% of the homes have a fax machine and 52% have a personal computer. Suppose 91% of the homes with a fax machine also have a personal computer. What is the probability that a home with a personal computer has a fax machine? A. .91 B. .52 C. .10 D. .19 E. .17 128. In a recent survey of homes in a major Midwestern city, 10% of the homes have a fax machine and 52% have a personal computer. Suppose 91% of the homes with a fax machine also have a personal computer. Are the events "owning a fax machine" and "owning a personal computer" independent? A. Yes, independent B. No, not independent 129. A batch of 50 parts contains 6 defects. If two parts are drawn randomly one at a time without replacement, what is the probability that both parts are defective? A. 0.014 B. 0.012 C. 0.120 D. 0.102 E. 0.222 130. A batch of 50 parts contains 6 defects. If two parts are drawn randomly, one at a time with replacement, what is the probability that both parts are defective? A. 0.014 B. 0.012 C. 0.120 D. 0.102 E. 0.222 1-271 Chapter 01 - An Introduction to Business Statistics 131. In the word BUSINESS, what is the probability of randomly selecting the letter S? A. 2/8 B. 1/8 C. 3/8 D. 5/8 132. Suppose that you believe that the probability you will get a grade of B or better in Introduction to Finance is .6, and the probability that you will get a grade of B or better in Introduction to Accounting is .5. If these events are independent, what is the probability that you will get a grade of B or better in both courses? A. 0.300 B. 0.833 C. 0.600 D. 0.500 E. 0.800 133. In a major Midwestern university, 55% of all undergraduates are female, 25% belong to a Greek organization (fraternity or sorority) and 40% of all males belong to a Greek organization. What percent of the undergraduates are female and in a Greek organization? A. 55% B. 25% C. 60% D. 7% E. 15% 134. In a major Midwestern university, 55% of all undergraduates are female, 25% belong to a Greek organization (fraternity or sorority) and 40% of all males belong to a Greek organization. What is the probability that one randomly selected undergraduate will be either a female or belong to a Greek organization? A. .55 B. .73 C. .80 D. .07 E. .87 1-272 Chapter 01 - An Introduction to Business Statistics 135. In a major Midwestern university, 55% of all undergraduates are female, 25% belong to a Greek organization (fraternity or sorority) and 40% of all males belong to a Greek organization. What is the probability that an undergraduate is in a Greek organization given that the undergraduate is a female? A. .07 B. .55 C. .127 D. .039 E. 138 136. In a major Midwestern university, 55% of all undergraduates are female, 25% belong to a Greek organization (fraternity or sorority) and 40% of all males belong to a Greek organization. Are the events "female/not female" and "belongs to a Greek organization" independent? A. Yes, independent B. No, not independent 137. At a certain university, 30% of the students major in zoology. Of the students majoring in zoology, 60% are males. Of all the students at the university, 70% are males. What percentage of the students are males majoring in zoology? A. 60% B. 42% C. 12% D. 18% E. 70% 138. At a certain university, 30% of the students major in zoology. Of the students majoring in zoology, 60% are males. Of all the students at the university, 70% are males. What is the probability that one randomly selected student is a male or is majoring in zoology? A. 1.00 B. 0.60 C....
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