# stats

posted by .

A random sample of mid-sized cars tested for fuel consumption gave a mean of miles per gallon with a standard deviation of miles per gallon.

Assuming that the miles per gallon given by all mid-sized cars have a normal distribution, find a confidence interval for the population mean, .

Round your answers to two decimal places.

• stats -

Use a confidence interval formula for the data.

Here is an example of one for a 95% confidence interval:

CI95 = mean ± 1.96 (sd/√n)

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### statistics

An auto maker estimates that the mean gas mileage of its sport utility vehicle is 20 miles per gallon. A random sample of 8 such vehicles had a mean of 18 per gallon and a standard deviation of 5 miles per gallon. At á=0.05, can you …
2. ### statistics

16. Based on tests of the Chevrolet Cobalt, engineers have found that the miles per gallon in highway driving are normally distributed, with a mean of 32 miles per gallon and a standard deviation 3.5 miles per gallon
3. ### statistics

A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3 kilometers per liter. i) Assuming that the kilometers per liter given by all mid-sized cars …
4. ### Statistics

A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3 kilometers per liter. i) Assuming that the kilometers per liter given by all mid-sized cars …
5. ### Basic Statistics

A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per litre with a standard deviation of 2.3 kilometers per litre. (a)Assuming that the kilometers per litre given by all mid-sized cars …
6. ### statistics

A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3. (a) Assuming that the kilometers per liter given by all mid-sized cars have a normal distribution, …
7. ### Stats

Suppose that you drive \$32,000 miles per year and gas averages \$2.50 per gallon. What will you save in annual fuel expenses by owning a hybrid car averaging 50 miles per gallon rather than an SUV averaging 12 miles per gallon.
8. ### math

A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3. (a) Assuming that the kilometers per liter given by all mid-sized cars have a normal distribution, …
9. ### math

B) A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4Kilometers per liter with a standard deviation of 2.3 kilometers per liter. i) Assuming that the kilometers per liter given by all mid-sized cars …
10. ### Statistics

What is the average miles per gallon (mpg) for all new cars?

More Similar Questions