Posted by **liam** on Monday, March 28, 2011 at 2:09pm.

A sample of 12 observations is selected from a normal population for which the population standard deviation is known to be 4. The sample mean is 19. (Round your answers to 3 decimal places.)

(a) The standard error of the mean is

The 90 percent confidence interval for the population mean is between and

## Answer This Question

## Related Questions

- statistics - A sample of 40 observations is selected from one approximately ...
- statistics - A sample of 40 observations is selected from one approximately ...
- math - sample of 40 observations is selected from one population with a ...
- Stats - Suppose the following data are selected randomly from a population of ...
- research statistics - Forty-nine items are randomly selected from a population ...
- Statistics - 8. A sample of 65 observations is selected from one population. The...
- statistics - 7. A sample of 40 observations is selected from one population. The...
- stats - The mean tax-return preparation fee H&R Block charged retail customers ...
- statistic - A random sample of size n = 72 is taken from a finite population of ...
- statistics - Over the past several months, an adult patient has been treated for...

More Related Questions