Posted by **Jason L** on Monday, February 26, 2007 at 3:50pm.

It is known that the amount of time needed to change the oil in a car is normally distributed. A random sample of 100 oil changes yielded a sample mean of 22 minutes and a standard deviation of 5 minutes. Then compared to the interval estimate for the previous question. This 99% confidence interval estimate of the mean of the population would be -

identical

much more precise

a bit more precise

a bit less precise

much less precise

Check your data from the previous question to help you answer this one.

## Answer This Question

## Related Questions

- Stats - It is known that the amount of time needed to change the oil in a car is...
- Statistics - It is known that the amount of time needed to change the oil in a ...
- Stats - the typical saturday the oil change facility will perform 40 oil changes...
- statistics - from a normally distributed infinite number of iron bars lengths ...
- statistics - A sample of 100 iron bars is said to be drawn from a large number ...
- statistics - A study of the amount of time it takes a mechanic to rebuild the ...
- Statistics - A hospital claims that the mean waiting time at its emergency room...
- Statistics - Are these statements true or false? 1. The sample mean, the sample ...
- stat - An oil change company advertises that they can change the oil in your car...
- statistics - a repair shop believes that people travel more than 3500 miles ...

More Related Questions