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# If six 6 individuals give blood find the probability

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Unformatted text preview: uble in service can be repaired. Historically, the data show that the likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For the first five troubles reported on a given day, what is the probability that: All five will be repaired on the same day? A. .0010 B. .6328 C. .9990 D. .2373 113. An important part of the customer service responsibilities of a cable company relates to the speed with which trouble in service can be repaired. Historically, the data show that the likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For the first five troubles reported on a given day, what is the probability that: Fewer than two troubles will be repaired on the same day? A. .6328 B. .0010 C. .0156 D. .0146 1-376 Chapter 01 - An Introduction to Business Statistics 114. An important part of the customer service responsibilities of a cable company relates to the speed with which trouble in service can be repaired. Historically, the data show that the likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For the first five troubles reported on a given day, what is the probability that: At least 3 troubles will be repaired on the same day. A. .1035 B. .0376 C. .9624 D. .8965 115. An important part of the customer service responsibilities of a cable company relates to the speed with which trouble in service can be repaired. Historically, the data show that the likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For the first five troubles reported on a given day, what is the probability that: Find the mean number of troubles repaired on the same day. A. 3.75 B. 0.94 C. 1.94 D. 2.50 116. The Post Office has established a record in a major Midwestern city for delivering 90% of its local mail the next working day. If you mail eight local letters, what is the probability that all of them will be delivered the next day. A. 1.0 B. .4305 C. .8131 D. .5695 117. The Post Office has established a record in a major Midwestern city for delivering 90% of its local mail the next working day. Of the eight, what is the average number you expect to be delivered the next day? A. 3.6 B. 4.0 C. 7.2 D. 2.7 1-377 Chapter 01 - An Introduction to Business Statistics 118. The Post Office has established a record in a major Midwestern city for delivering 90% of its local mail the next working day. Calculate the standard deviation of the number delivered when 8 local letters are mailed. A. .85 B. .72 C. 2.68 D. 2.83 119. The Post Office has established a record in a major Midwestern city for delivering 90% of its local mail the next working day when there are 8 local letters mailed .What is the probability that the number of delivered will be within 2 standard deviations of the mean? A. .9950 B. .9619 C. .8131 D. .9996 120. A car wash loses \$30 on rainy days and makes \$120 on days when it does not rain. If the probability of rain is 0.15, calculate the car wash's expected profit. A. \$90 B. \$76.50 C. \$106.50 D. \$97.50 121. An insurance company will insure a \$75,000 Hummer for its full value against theft at a premium of \$1500 per year. Suppose that the probability that the Hummer will be stolen is 0.0075. Calculate the insurance company's expected net profit. A. \$937.50 B. \$551.25 C. \$1488.75 D. \$562.50 1-378 Chapter 01 - An Introduction to Business Statistics 122. An insurance company will insure a \$75,000 Hummer for its full value against theft at a premium of \$1500 per year. Suppose that the probability that the Hummer will be stolen is 0.0075. Find the premium that the insurance company should charge if its wants it's expected net profit to be \$2000? A. \$1437.50 B. \$2551.25 C. \$2562.50 D. \$2062.50 123. A large disaster cleaning company estimates that 30% of the jobs it bids on are finished within the bid time. Looking at a random sample of 8 jobs that is has contracted: Calculate the probability that exactly 4 of the jobs were not completed within the bid time. A. .0081 B. .2401 C. .0113 D. .1361 124. A large disaster cleaning company estimates that 30% of the jobs it bids on are finished within the bid time. Looking at a random sample of 8 jobs that is has contracted: Calculate the mean number of jobs completed within the bid time. A. 4.0 B. 2.4 C. 2.0 D. 5.6 125. A large disaster cleaning company estimates that 30% of the jobs it bids on are finished within the bid time. Looking at a random sample of 8 jobs that is has contracted: Find the probability that x (number of jobs finished on time) is within one standard deviation of the mean. A. .6867 B. .7483 C. .5506 D. .8844 1-379 Chapter 01 - An Introduction to Business Statistics 126. Suppose that x has a hypergeometric distribution with N = 10, r = 5 and n = 3. Calculate the mean of the distribution. A. 0.500 B. 0.333 C. 1.500 D. 3.000 127. Suppose that x has a hypergeometric distribution with N = 10, r = 5 and n = 3. Calculate the standard deviation of the distribution. A. 0.583 B. 0.764 C. 1.500 D. 0.778 128. If in a hypergeometric di...
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