# Statistics

posted by
**Jason L**
.

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.