I have 3 questions,

1.)

The following TI-84 Plus display presents some population parameters. 1-Var-Stats x =154 E x=2680 E x =359,620 SX=8.671793355 OX= 9 I n=20 Part 1 of 3 (a) Assume the population is bell-shaped. Approximately what percentage of the population values are between 127 and 181? Approximately all or almost all v of the population values fall between 127 and 181. Part: 1 / 3 Part 2 of 3 (b) Assume the population is bell-shaped. Between what two values will approximately 95% of the population be? Approximately 95% of the population values will fall between andSports car or convertible? The following table presents the fuel efficiency, in miles per gallon, for a sample of convertibles and a sample of sports cars. Convertible Model MPG Sports Model MPG Mini Cooper 25 Mazda3 Mazdaspeed 24 Saab 9-3 24 Subaru Impreza WRX STI 21 BMW 328i 21 Mazda RX-8 18 Toyota Camry Solara 21 Mitsubishi Lancer Evolution 21 Volvo C70 21 Volkswagen GTI 25 Ford Mustang V6 20 Honda Civic Si 27 Send data to Excel Part: 0 / 2 Part 1 of 2 (a) Find the sample standard deviation of the mileage for the sample of convertibles. Round the answer to one decimal place. The sample standard deviation for the convertibles, in miles per gallon, isLunch break: In a recent survey of 655 working Americans ages 25 34, the average weekly amount spent on lunch was $45.01 with standard deviation $238. The weekly amounts are approximately bellshaped. (a) Estimate the percentage of amounts that are between $36.67 and 553.35. of the amounts fall between $36.67 and $53.35. (b) Estimate the percentage of amounts that are between $42.23 and $47.79. Approximately 68% 7 of the amounts fall between $42.23 and $47.79. ((2) Between what two values will approximately 95% of the amounts be? Approximately 95% of the amounts fall between 3D and 5D