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Timed Test This test has a time limit of 3 hours. This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 56 minutes, 50 seconds. * Question Completion Status: -> Moving to another question will save this response. > Question 8 1 points Save Answer Winnipeg Tribune claims that the time of travel from downtown to the University via the Pembina bus has an average of u = 27 minutes. A student who normally takes this bus believes that u is less than 27 minutes. A sample of six ride-times taken to test the hypothesis of interest gave mean = 26.5 minutes and standard deviation, s = 2.43 minutes. The value of the test statistic for testing this hypothesis is: Page 4 OA. 0.460 O B. - 0.504 O C. 0.504 O.D. - 0.532 OE - 0.460 > A Moving to another question will save this response. MacBook AirTimed Test This test has a time limit of 3 hours. This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 56 minutes, 18 seconds. * Question Completion Status: 1.> Moving to another question will save this response. 29 Question 10 1 points Save Answer One of the side effects of flooding a lake in northern boreal forest areas (e.g. for a hydro-electric project) is that mercury is leached from the soil, enters the food chain, and eventually contaminates the fish. The concentration in fish will vary among individual fish because of differences in eating patterns, movements around the lake, etc. Suppose that concentrations of mercury in individual fish follow an approximate normal distribution with a mean of 0.25 ppm and a standard deviation of 0.08 ppm. Fish are safe to eat if the mercury level is below 0.30 ppm. What proportion of fish are safe to eat? OA. *27% OB._ 74% O C. 23% OD. 63% OE 69% W/ Moving to another question will save this response MacBook Air 471) F12coments Timed Test This test has a time limit of 3 hours. This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. ents RES Remaining Time: 2 hours, 58 minutes, 26 seconds. on Board HRS,/STAFF INFO Question Completion Status: NMENTS OOK CHAPTERS > Moving to another question will save this response. > ides Question 3 Meeting 1 points Save Artswer e Exams The developer of an energy-efficient lawn mower engine claims that the engine will run continuously for 300 minutes on a single gallon of regular gasoline. Suppose a simple random sample of 50 engines is tested. The engines run for an average of 295 minutes, and the population standard deviation sigma is known to be 20 minutes. Test the null hypothesis that the mean run time is 300 minutes against the alternative hypothesis that the mean run time is not 300 minutes. Use a 0.05 level of Tools significance. Resources State the critical value(s) for this test. it Bb Help OA Z = $1.645 it IT Guide O B. Z = +2.326 Resources O C.Z = $1.96 Page O D.t = +2.093 OE The correct answer is not among the choices. Moving to another question will save this response. MacBook Air F9 F10 44 F7 FBThis test has a time limit of 3 hours. This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts, Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 56 minutes, 05 seconds. FF INFO * Question Completion Status: TERS > A Moving to another question will save this response. 25 Question 11 1 points Save Answer One of the side effects of flooding a lake in northern boreal forest areas (e.g. for a hydro-electric project) is that mercury is leached from the soil, enters the food chain, and eventually contaminates the fish. The concentration in fish will vary among individual fish because of differences in eating patterns, movements around the lake, etc. Suppose that concentrations of mercury in individual fish follow an approximate normal distribution with a mean of 0.25 ppm and a standard deviation of 0.08 ppm. Fish are safe to eat if the mercury level is below 0.30 ppm. The Department of Fisheries and Oceans wishes to know the mercury level of the bottom 20% of the fish. The appropriate percentile and mercury level for this lake is: OA 20th percentile has a value of 0.18 ppm O B. 20th percentile has a value of -0.84 ppm O C. The correct answer is not among the choices. O.D. 80th percentile has a value of 0.84 ppm OE 80th percentile has a value of 0.32 ppm > Moving to another question will save this response. MacBook Air