A pet store keeps track of the purchases of customers over a four hour period. The store manager classifies purchases as containing a dog product, a cat product, a fish product, or product for a different kind of pet. She found that 83 purchased a dog product; 101 purchased a cat product; 22 purchased a fish product; 31 purchased a dog and a cat product; 8 purchased a dog and a fish product; 10 purchased a cat and a fish product; 6 purchased a dog, a cat, and a fish product, 34 purchased a product for a pet other than a dog, cat, or fish. How many purchases were for a dog or a fish product?

A survey is taken of 100 health club members regarding their use of the club's exercise facilities. The following information was obtained: 16 use the gym, pool, and weight room; 29 use both the gym and the pool; 23 use both the gym and the weight room; 40 use the gym; 68 use either the gym or the pool; 14 use only the pool; 18 use none of the three facilities. How many use the pool? How many use only the weight room?

A survey of 125 freshmen business students at a local university produced the results listed below. How many students took only music? 30 took English;33 took math;32 took music;14 took English but not math;9 took math and music;12 took English and music;3 took all three

Problem: Of 1,000 people consulted, 811 liked chocolates, 752 liked toffees and 418 liked sweets, 570 liked chocolates and toffees; 356 chocolates and sweets and 348 liked toffees and sweets : 297 liked all three. Is this information correct?

Assume that you are employed by a mobile phone company and you want to characterize costumers on the basis of their mobile-phone activity. Which type of network would be most useful for representing the mobile-phone data of your company? Select one: a. Directed,Unweighted b. Directed,Weighted c. Simple d. Undirected, Weighted

The following table is of profit, revenue, and number of employees of 10 companies. Profit US $ billion Revenue/employee No. of Employees Exxon Royal Dutch British Petroleum Petrofina SA Texao In Elf Aquitaine ENI Chevron Corp. PDVSA SK 11.7 7.4 4.4 2.3 2.9 0.98 3.4 3.1 4.5 0.125 US$ 96,170 74,288 70,859 67,396 92,102 11,461 37,415 84,615 84,821 4,087 a) For the 10 companies, the mean profit per company is $ (Round answer to one decimal place.) c) The "overall" mean profit per employee is $ (Round answer to nearest whole number.) billion US. b) The "overall" mean revenue per employee (i.e., for all employees of these firms combined) of the 10 companies is US. $ (Round answer to nearest whole number.) 122900 105100 56440 69062 29311 83800 80176 39364 56597 30595 US/employee.

Human blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a blood specimen is typed, the presence of the A and/or B antigen is indicated by listing the letter A and/or the letter B. If neither the A nor the B antigen is present, the letter O is used.The following table gives the percent of a certain country's population having each of the eight possible blood types in the sample space. Note that the presence or absence of the Rh antigen is indicated by the symbols + or −, respectively. Blood Types A+ A− B+ B− AB+ AB− O+ O− Percent 35.7 6.3 9.5 2.5 3.4 0.8 37.2 4.6 (a) What is the probability that a person selected randomly from the population has a blood type that is type O or Rh+?(b) What is the probability that a person selected randomly from the population has a blood type that contains the A antigen?(c) What is the probability that a person selected randomly from the population has a blood type that is type AB or Rh−?

Maya has two ways to travel from her home in Norco to her office in Los Angeles. One is to go via the 10 Freeway, and the other is to go via 60 Freeway. In order to determine which way she should travel on a daily basis, Maya has recorded the travel times for samples of eleven trips via the 10 Freeway and eleven trips via the 60 Freeway. The following table gives the travel times (in minutes) for the twenty-two trips. Travel times in minutes 10 Freeway 74, 72, 75, 75, 74, 72, 67, 67, 75, 69, 71 60 Freeway 70, 80, 69, 71, 69, 77, 68, 79, 74, 79, 77 Send data to calculator Send data to Excel Assume that the two populations of travel times are normally distributed and that the population variances are equal. Can we conclude, at the 0.05 level of significance, that u,, the mean travel time via the 10 freeway, is different from µ,, the mean travel time via the 60 freeway? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal…

The owner of Blackstone Inc. opened 3 stores in different parts of the city and would like to compare the number of sales transactions made after 2 months of operation. The number of sales transactions at the 3 stores are displayed in the chart below: Number of Transactions 250 200 150 100 50 140 180 170 194 SUBMIT QUESTION 2 156 184 Month 1 Month 2 SAVE PROGRESS SUY

A survey of 150 freshmen business students at a local university produced the results listed below. How many students took only religion? 35 took history;42 took science;43 took religion;19 took history but not science;14 took science and religion;15 took history and religion;6 took all three