The combined gas mileage of mid-size cars varies with mean 25 miles per gallon (mpg) and...
The combined gas mileage of mid-size cars varies with mean 25 miles per gallon (mpg) and a standard deviation of about 5.3 mpg. A particular rental car agency typically has 88 midsize cars in its lot. Assume the distribution of combined gas mileage of mid-size cars is Normal.
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Find the probability that the combined gas mileage for a randomly selected car in the lot is higher than 25 mpg.
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Find the probability that the mean combined gas mileage for all cars in the lot is between 26 and 27 mpg.
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Find the probability that the mean combined gas mileage for all cars in the lot is lower than 25.5 mpg.
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Find the probability that the mean combined gas mileage for all cars in the lot is 25 mpg.
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Would you be surprised to find that the mean combined gas mileage for all cars in the lot is 26 mpg? Explain.
Homework Answers
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The combined gas mileage of mid-size cars varies with mean 25
miles per gallon (mpg) and...
a certain car model has a mean gas mileage of 34 Miles per gallon (mpg) with...
a certain car model has a mean gas mileage of 34 Miles per
gallon (mpg) with a population standard deviation for. A pizza
delivery company buys a sample of 54 of these cars. What is the
probability that the average mileage of the fleet is greater than
33.7 MPG?
Question 14 (3 points) A certain car model has a mean gas mileage of 34 miles per gallon (mpg) with a population standard deviation 4. A pizza delivery company buys a...
A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally...
A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 26 mpg and a standard deviation of 4 mpg. Find the probability that a car selected at random has the following gas mileages. (Round your answers to four decimal places.) (a) less than 20 mpg (b) greater than 28 mpg (c) between 24 and 28 mpg
A certain car model has a mean gas mileage of 34 miles per gallon with a...
A certain car model has a mean gas mileage of 34 miles per gallon with a standard deviation of 4 mpg. A pizza delivery conpany buys 54 of these cars. What is the probability that the average mileage of the fleet is between 33.3 and 34.3 mpg?
A certain car model has a mean glass milage of 34 miles per gallon (mpg) with...
A certain car model has a mean glass milage of 34 miles per
gallon (mpg) with a standard deviation 5mpg. A pizza delivery
company buys 43 of these cars. What is the probability that the
average milage of the fleet is greater than 33.5 mpg?
33) A certain car model has a mean gas mileage of 34 miles per gallon (mpg) with a standard deviation 5 mpg. A pizza delivery company buys 43 of these cars. What is the probability...
Suppose that the miles-per-gallon (mpg) rating of passenger cars is normally distributed with a mean and...
Suppose that the miles-per-gallon (mpg) rating of passenger cars is normally distributed with a mean and a standard deviation of 39.3 and 2.9 mpg, respectively. [You may find it useful to reference the z table.] a. What is the probability that a randomly selected passenger car gets more than 40 mpg? (Round “z” value to 2 decimal places, and final answer to 4 decimal places.) Probability:________________ b. What is the probability that the average mpg of four randomly selected passenger...
Suppose that the miles-per-gallon (mpg) rating of passenger cars is normally distributed with a mean and...
Suppose that the miles-per-gallon (mpg) rating of passenger cars is normally distributed with a mean and a standard deviation of 35.7 and 4.9 mpg, respectively. [You may find it useful to reference the z table.] a. What is the probability that a randomly selected passenger car gets more than 36 mpg? (Round “z” value to 2 decimal places, and final answer to 4 decimal places.) b. What is the probability that the average mpg of four randomly selected passenger cars...
The manufacturer of a new car claims that miles per gallon for the gas consumption is...
The manufacturer of a new car claims that miles per gallon for the gas consumption is normally distributed with a mean of 25.9 mpg and a standard deviation of 3.1 mpg. a.) If one car is tested, what is the probability that the mean mpg is less than 24 mpg? b.) If 30 cars are tested, what is the probability that the mean mpg is less than 24 mpg? c.) If one car is tested, what is the probability that...
A certain car model has a mean gas mil standard deviation 3 mpg. A pizza del...
A certain car model has a mean gas mil standard deviation 3 mpg. A pizza del probability that the average mileage of 1 car model has a mean gas mileage of 28 miles per gallon (mpg) with a delivery company buys 47 of these cars. What is the mity that the average mileage of the fleet is greater than 27.3 mpg?
SAMPLING DISTRIBUTION The manufacturer of a new compact car claims the miles per gallon (mpg) for...
SAMPLING DISTRIBUTION The manufacturer of a new compact car claims the miles per gallon (mpg) for gasoline consumption is normally distribution with u = 26.3 mpg and standard deviation 6 = 9.0 mpg. A consumer agency is looking to verify the manufacturer's claim. If a sample of 36 cars are tested, what is the probability that the mean mpg 7 is (a) less than 23 mpg? (b) more than 29 mpg? (b) between 23 and 29 mpg?
Suppose that the miles-per-gallon (mp) rating of passenger cars is normally distributed with a mean and...
Suppose that the miles-per-gallon (mp) rating of passenger cars is normally distributed with a mean and a standard deviation of 36.6 and 3.7 mpg, respectively. [You may find it useful to reference the z table.J a. What is the probability that a randomly selected passenger car gets more than 37 mpg? (Round" final answer to 4 decimal places.) value to 2 decimal places, and b. What is the probability that the average mpg of three randomly selected passenger cars is...
a certain car model has a mean gas mileage of 34 Miles per
gallon (mpg) with a population standard deviation for. A pizza
delivery company buys a sample of 54 of these cars. What is the
probability that the average mileage of the fleet is greater than
33.7 MPG?
Question 14 (3 points) A certain car model has a mean gas mileage of 34 miles per gallon (mpg) with a population standard deviation 4. A pizza delivery company buys a...
A certain car model has a mean glass milage of 34 miles per
gallon (mpg) with a standard deviation 5mpg. A pizza delivery
company buys 43 of these cars. What is the probability that the
average milage of the fleet is greater than 33.5 mpg?
33) A certain car model has a mean gas mileage of 34 miles per gallon (mpg) with a standard deviation 5 mpg. A pizza delivery company buys 43 of these cars. What is the probability...
A certain car model has a mean gas mil standard deviation 3 mpg. A pizza del probability that the average mileage of 1 car model has a mean gas mileage of 28 miles per gallon (mpg) with a delivery company buys 47 of these cars. What is the mity that the average mileage of the fleet is greater than 27.3 mpg?
SAMPLING DISTRIBUTION The manufacturer of a new compact car claims the miles per gallon (mpg) for gasoline consumption is normally distribution with u = 26.3 mpg and standard deviation 6 = 9.0 mpg. A consumer agency is looking to verify the manufacturer's claim. If a sample of 36 cars are tested, what is the probability that the mean mpg 7 is (a) less than 23 mpg? (b) more than 29 mpg? (b) between 23 and 29 mpg?
Suppose that the miles-per-gallon (mp) rating of passenger cars is normally distributed with a mean and a standard deviation of 36.6 and 3.7 mpg, respectively. [You may find it useful to reference the z table.J a. What is the probability that a randomly selected passenger car gets more than 37 mpg? (Round" final answer to 4 decimal places.) value to 2 decimal places, and b. What is the probability that the average mpg of three randomly selected passenger cars is...
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