Saturday

April 19, 2014

April 19, 2014

Posted by **tea** on Monday, March 26, 2012 at 12:49am.

a) If the claim by Get-A-Grip is true, what is the mean of the sampling distribution of for samples of size ? (2 pts)

b) If the claim by Get-A-Grip is true, what is the standard deviation of the sampling distribution of for samples of size ? (4 pts)

c) If the distribution of tire life is approximately normal, what is the probability that the mean of a random sample of size n = 4 of tire lifetimes will be less than 20,000 miles? (6 pts)

**Related Questions**

Statistics - According to internal testing done by the Get-A-Grip tire company, ...

Chemistry - Assume that a bicycle tire with an internral volume of 1.50 liters ...

chem 1p1 - An automobile tire at 22oC with an internal volume of 20.0L is filled...

Statistics - Wrong tire pressure can increase tire wear and decrease gas mileage...

statistics - Please help asap! A tire company is considering a tire replacement ...

statistics - If a teacher wants to test her belief that more than 5 students in ...

Statistics - The lifetime of a certain type of automobile tire (in thousands of ...

statistics - one of the major U.S. tire makers wishes to review its warranty for...

Math - The air pressure in a tire is 800.000kPa.The internal surface area of the...

statistics - Assume that Acme Tires sells their high performance tires for $180 ...