Question

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 32 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 26 mpg (b) greater than 34 mpg (c) between 30 and 34 mpg

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A certain car model has a mean gas mileage of 31 miles per gallon (mpg) with...
A certain car model has a mean gas mileage of 31 miles per gallon (mpg) with a standard deviation 3 mpg. A pizza delivery company buys 43 of these cars. What is the probability that the average mileage of the fleet is greater than 30.7 mph
A certain car model has a mean gas mileage of 31 miles per gallon (mpg) with...
A certain car model has a mean gas mileage of 31 miles per gallon (mpg) with astandard deviation 3 mpg. A pizza delivery company buys 43 of these cars. What is theprobability that the average mileage of the fleet is greater than 30.7 mpg?
Suppose you buy a new car whose advertised mileage is 23 miles per gallon​ (mpg). After...
Suppose you buy a new car whose advertised mileage is 23 miles per gallon​ (mpg). After driving your car for several​ months, you find that its mileage is 18.5 mpg. You telephone the manufacturer and learn that the standard deviation of gas mileages for all cars of the model you bought is 1.24 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...
The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the...
The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.3 miles per gallon.​ (a) What proportion of hybrids gets over 61 miles per​ gallon? (b) What proportion of hybrids gets 52 miles per gallon or​ less? (c) What proportion of hybrids gets between 59 and 62 miles per​ gallon? (d) What is the probability that a randomly selected hybrid gets less than...
A Ford Focus manual transmission gets an average of 28 miles per gallon (mpg) in city...
A Ford Focus manual transmission gets an average of 28 miles per gallon (mpg) in city driving with a standard deviation of 1.6 mpg. Assume that gas mileage is normally distributed. a) If a Focus is selected at random, what is the probability that it will get more than 31 mpg? b) What is the probability that a randomly selected Focus will get between 20 and 30 mpg? c) What is the probability that a randomly selected Focus will get...
A car has a gas mileage listing of 28 miles per gallon. You take the car...
A car has a gas mileage listing of 28 miles per gallon. You take the car out on 56 trips and find the average gas mileage to be 25 with a standard deviation of 6 mpg. a) At the .01 level is the car getting gas mileage less than expected? (p = 0) b) True or false: natural variability is the reason for the change in gas mileage Answer:
An automobile manufacturer introduces a new model that averages 27 miles per gallon in the city....
An automobile manufacturer introduces a new model that averages 27 miles per gallon in the city. A person who plans to purchase one of these new cars wrote the manufacturer for the details of the tests, and found out that the standard deviation is 3 miles per gallon. Assume that in-city mileage is approximately normally distributed (use z score table) a) What percentage of the time is the car averaging less than 20 miles per gallon for in-city driving. b)...
Assume that gas mileage for cars is normally distributed with a mean of 23.5 miles per...
Assume that gas mileage for cars is normally distributed with a mean of 23.5 miles per gallon and a standard deviation of 10 miles per gallon. Show all work. Just the answer, without supporting work, will receive no credit. (a) What is the probability that a randomly selected car gets between 15 and 30 miles per gallon? (Round the answer to 4 decimal places) (b) Find the 75th percentile of the gas mileage distribution. (Round the answer to 2 decimal...
A car manufacturer claims that the miles per gallon (mpg) of all its midsize cars can...
A car manufacturer claims that the miles per gallon (mpg) of all its midsize cars can be modeled with a normal model with N(33, 1.70). What proportion of cars have miles per gallon less than 31.2 [P(x ≤ 31.2 mpg)]? What proportion of cars will have miles per gallon greater than 36 [P(x ≥ 36 mpg)]? What proportion of cars will have miles per gallon greater than 29.7 [P(x ≥ 29.7 mpg)]? What proportion of cars will have miles per...
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 33.4 and 3.4 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 34 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 five randomly selected passenger cars...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT