Posted by **Terra ** on Thursday, January 12, 2012 at 5:30pm.

The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.9 grams per mile and standard deviation 0.15 grams per mile .

(a) What sample size is needed so that the standard deviation of the sampling distribution is 0.01 grams per mile ?

- Statistics -
**Terra **, Thursday, January 12, 2012 at 8:14pm
Never mind, got it. If anyone wants to know how to get it though...

1.5/(sq root of .9)=.01

Solve the equation, then square each side.

Answer=225

- Statistics -
**Terra **, Thursday, January 12, 2012 at 8:16pm
And by .9 I definitely meant n.....haha

## Answer this Question

## Related Questions

- statistics - Seventy million pounds of trout are grown in the U.S. every year. ...
- statistics - Seventy million pounds of trout are grown in the U.S. every year. ...
- Statistics - The USDA size standards for eggs are based on weight and are as ...
- statistics - 2 Packets of crisps from a production line have a weight ...
- statistics/Help Please!! - In a sample of seven cars, each car was tested for ...
- statistics - what are the mean and standard deviation of a sampling distribution...
- Stat 1 - Seventy million pounds of trout are grown in the U.S. every year. Farm-...
- Statistics - A particular fruit's weights are normally distributed, with a mean ...
- statistics - For a certain group of individuals, the mean hemoglobin level in ...
- Statistics - A particular fruit's weights are normally distributed, with a mean ...

More Related Questions