Thursday

October 2, 2014

October 2, 2014

Posted by **tone** on Saturday, March 10, 2012 at 10:14pm.

- statistics -
**PsyDAG**, Sunday, March 11, 2012 at 11:52amWhat is your question?

- statistics -
**tone**, Sunday, March 11, 2012 at 7:13pm16. 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.

a) What is the probability that randomly selected Cobalt gets more than 34 miles per gallon?

The answer is approximately =0.017

b) Ten Cobalts are randomly selected and the miles per gallon for each car are recorded. What is the probability that the mean miles per gallon exceed 34 miles per gallon?

The final answer will be = 0.0351

c) Twenty Cobalts are randomly selected and the miles per gallon for each car are recorded, What is the probability that the mean miles per gallon exceeds 34 miles per gallon? Would this result be unusual? Explain.

The sample mean obtained is unusual.

17. Burger King's Drive-Through: Suppose that cars arrive at Burger King's drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 PM. A random sample of 40 one-hour time periods between 12:00 noon and 1:00 P.M. is selected and has 22.1 as the mean number of cars arriving.

- statistics -
**Linz**, Tuesday, November 6, 2012 at 10:43pmHow did you find part a?

**Answer this Question**

**Related Questions**

statistics - An auto maker estimates that the mean gas mileage of its sport ...

Math - The Honda Civic Hybrid vehicle, powered by gasoline-electric technology, ...

Math - According to a rating agency, a car's MPG (miles per gallon) ratings are...

Math - According to a rating agency, a car's MPG (miles per gallon) ratings are...

Math - According to a rating agency, a car's MPG (miles per gallon) ratings are...

Business Statistics 2 - A consumer research group is interested in testing an ...

stats - A random sample of mid-sized cars tested for fuel consumption gave a ...

Stats - how did you come to this answer? The answer is approximately =0.017 b) ...

Algebra Word Problems - when going more than 38 miles per hour the gas mileage ...

MTH233/statistics UOP - A car company says that the mean gas mileage for its ...