Mathematics

Mathematics, 19.07.2019 05:30, matt6742

The newest model of smart car is supposed to get excellent gas mileage. a thorough study showed that gas mileage (measured in miles per gallon) is normally distributed with a mean of 75 miles per gallon and a standard deviation of 10 miles per gallon. what is the probability that, if driven normally, the car will get 100 miles per gallon or better

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Mathematics, 20.07.2019 04:30, samm2002

Acertain car model has a mean gas mileage of 28 miles per gallon with a standard deviation 5 mpg. suppose nothing is known about the distribution of gas mileage. a pizza delivery company buys 37 of these cars. what is the probability that the average mileage of the fleet us between 27.2 and 28.8 mpg?

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Mathematics, 10.09.2019 19:30, jewelz5887

Suppose you buy a new car whose advertised mileage is 20 miles per gallon (mpg). after driving your car for several months, you find that its mileage is 16.4 mpg. you telephone the manufacturer and learn that the standard deviation of gas mileages for all cars of the model you bought is 1.14 mpg. a. find the z-score for the gas mileage of your car, assuming the advertised claim is correct. b. does it appear that your car is getting unusually low gas mileage? a. zequals nothing (round to two decimal places as needed.) b. does it appear that your car is getting unusually low gas mileage? yes no

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Mathematics, 06.10.2019 08:30, vane9317

The gas mileage for a certain model of car is known to have a standard deviation of 4 mi/gallon. a simple random sample of 64 cars of this model is chosen and found to have a mean gas mileage of 27.5 mi/gallon. construct a 96.5% confidence interval for the mean gas mileage for this car model.

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Mathematics, 10.10.2019 19:00, nicollexo21

The newest model of smart car is supposed to get excellent gas mileage. a thorough study showed that gas mileage (measured in miles per gallon) is normally distributed with a mean of 75 miles per gallon and a standard deviation of 10 miles per gallon. what value represents the 50th percentile of this distribution?

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