Starting in 2004, a study to determine the number of lake sturgeon on Rainy River and Lake of the Woods on the United States-Canada border was conducted by the Canadian Ministry of Natural Resources, the Minnesota Department of Natural Resources, and the Rainy River First Nations. Using the capture-recapture method, the size of the population of lake sturgeon on Rainy River and Lake of the Woods was estimated at
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Excursions in Modern Mathematics (9th Edition)
- A biologist is studying the plant diversity in 15 million acres of the Sierra Nevada Mountains. He will count the number of species in 150 acres. Match the strategies to their corresponding sampling techniques. -abcde The biologist classifies the Sierras into 10 different ecological types and then makes sure that the proportion of each ecological type from the sample is the same as the proportion of that of the population. -abcde The biologist goes to 15 diverse locations that have 10 acres each and surveys all 10 acres for each of these 15 locations. -abcde The biologist goes to his 150 favorite hiking places and looks at an acres along each trail. -abcde The biologist enters the 15 million acres into a data base and had a computer randomly select 150 of these acres. -abcde The biologist orders the 15 million acres by latitude and then surveys every 100000th acre on the list. Simple Random Sampling Systematic Sampling Convenience Sampling Cluster Sampling Stratified Samplingarrow_forwardIn a study of the domestic market share of the three major automobile manufacturers A, B, and C in a certain country, it was found that their current market shares were 65%, 10%, and 25%, respectively. Furthermore, it was found that of the customers who bought a car manufactured by A, 75% would again buy a car manufactured by A, 15% would buy a car manufactured by B, and 10% would buy a car manufactured by C. Of the customers who bought a car manufactured by B, 90% would again buy a car manufactured by B, whereas 5% each would buy cars manufactured by A and C. Finally, of the customers who bought a car manufactured by C, 85% would again buy a car manufactured by C, 5% would buy a car manufactured by A, and 10% would buy a car manufactured by B. Assuming that these sentiments reflect the buying habits of customers in the future, determine the market share that will be held by each manufacturer after the next two model years. (Round your answers to the nearest percent.)arrow_forwardIn order to determine whether a particular medication was effective in curing the common cold, one group of patients was given the medication, while another group received sugar pills. The results of the study are shown below. PatientsCured PatientsNot Cured Received medication 70 10 Received sugar pills 20 50 We are interested in determining whether the medication was effective in curing the common cold.arrow_forward
- In a study of the domestic market share of the three major automobile manufacturers A, B, and C in a certain country, it was found that of the customers who bought a car manufactured by A, 75% would again buy a car manufactured by A, 15% would buy a car manufactured by B, and 10% would buy a car manufactured by C. Of the customers who bought a car manufactured by B, 90% would again buy a car manufactured by B, whereas 5% would buy cars manufactured by A and 5% would buy cars manufactured by C. Finally, of the customers who bought a car manufactured by C, 85% would again buy a car manufactured by C, 5% would buy a car manufactured by A, and 10% would buy a car manufactured by B. Assuming that these sentiments reflect the buying habits of customers in the future model years, determine the market share that will be held by each manufacturer in the long run. Solve using the Gauss Jordan method.arrow_forwardIn a study of the domestic market share of three major automobile manufacturers A, B and C in a certain country, it was found out that of the customers who bought a car manufactured by A, 75% would again buy a car manufactured by A, 15% would buy a car manufactured by B and the rest would buy a car manufactured by C. Of the customers who bought a car manufactured by B, 90% would again buy a car manufactured by B, 5% would buy a car manufactured by A and the rest would buy a car manufactured by C. Of the customers who bought a car manufactured by C, 85% would again buy a car manufactured by C, 5% would buy a car manufactured by A and the rest would buy a car manufactured by B. Required The long run market share of the manufacturersarrow_forwardIn many colleges, educators are changing their approach to instruction from a “teacher/lecture-centeredmodel” to a “student-centered model” where students learn in a laboratory environment in which lectureis deemphasized and students can proceed at a pace suitable to their learning needs. In once schoolwhere this model was being introduced, of the 743 students who enrolled in the traditional lecture model, 364 passed; of the 567 in the student-centered model, 335 passed. Use a 0.05 level ofsignificance to test the claim that student-centered model results in a higher pass rate than the traditionalmodel?arrow_forward
- In a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the Southern California Air Basin. The pollution intake is the amount of exhaust emissions, in grams per person per million grams emitted, that would be inhaled while traveling on the bus during its usual 18-mile18-mile trip on congested freeways from South Central LA to a magnet school in West LA. (In comparison, a city of 11 million people will inhale a total of about 1212 grams of exhaust per million grams emitted.) The amounts for the nine buses when driven with the windows open are given in the table. 1.15 0.33 0.40 0.33 1.35 0.38 0.25 0.40 0.35 A good way to judge the effect of outliers is to do your analysis twice, once with the outliers and a second time without them. Give the 90%90% confidence interval with all the data for the mean pollution intake among all school buses used in the Southern California Air Basin that…arrow_forwardIn a study of the domestic market share of the three major automobile manufacturers A, B, and C in a certain country, it was found that their current market shares were 45%, 20%, and 35%, respectively. Furthermore, it was found that of the customers who bought a car manufactured by A, 75% would again buy a car manufactured by A, 15% would buy a car manufactured by B, and 10% would buy a car manufactured by C. Of the customers who bought a car manufactured by B, 90% would again buy a car manufactured by B, whereas 5% each would buy cars manufactured by A and C. Finally, of the customers who bought a car manufactured by C, 85% would again buy a car manufactured by C, 5% would buy a car manufactured by A, and 10% would buy a car manufactured by B. Assuming that these sentiments reflect the buying habits of customers in the future, determine the market share that will be held by each manufacturer after the next two model years. (Round your answers to the nearest percent.) A % B…arrow_forwardAshton surveyed the students in his neighborhood and obtained the following contingency table that summarizes the school enrollment by level and type:arrow_forward
- In a study of the domestic market share of the three major automobile manufacturers A, B, and C in a certain country, it was found that of the customers who bought a car manufactured by A, 75% would again buy a car manufactured by A, 15% would buy a car manufactured by B, and 10% would buy and car manufactured by C. Of the customers who bought a car manufactured by B, 80% would again buy a car manufactured by B, whereas 10% each would buy cars manufactured by A and C. Finally, of the customers who bought a car manufactured by C, 85% would again buy a car manufactured by C, 5% would buy a car manufactured by A, and 10% would buy a car manufactured by B. Assuming that these sentiments reflect the buying habits of customers in the future model years, determine the market share that will be held by each manufacturer in the long run.arrow_forwardThe table below contains the total cost ($) for four tickets to a basketball game purchased on the secondary market, two beers, two soft drinks, two hot dogs, and one parking space at each arena during a recent season. 215.02 224.58 224.43 215.97 203.04 287.43 261.25 214.76 395.96 317.13 301.05 370.49 310.61 319.41 319.33 420.73 420.32 481.66 484.87 430.76 411.28 543.08 566.08 535.56 532.38 619.08 727.78 766.28 791.92 897.06 a. Organize these costs as an ordered array. b. Construct a frequency distribution and a percentage distribution for these costs. c. Around what values, if any, are at least 75% of the costs of attending the game concentrated? Explain. At least 75% of the costs of attending a game are concentrated around the class groupings "$200 but less than $400" and "$500 but less than $700." B. At least 75% of…arrow_forwardStudies show that about 18 percent of all businesses in the United States are minority-owned.Brian lives in Centerville, a town with a population of 25,000 and 200 businesses. Assuming that the national percentage holds true for the businesses in Centerville, how many of these are minority-owned?arrow_forward
- Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL