Posted by **Aboli** on Thursday, February 14, 2013 at 8:48am.

a manufacturer claims that the life time of a certain brand of batteries has a varaince of 5000(hours)^2. a sample of 26 has a variance of 7200(hours)^2. assuming that it is reasonable to treat these data as a random sample from a normal population, test the manufacturer's claim at alpha=0.02 level.

plz plz help me...!!!

## Answer This Question

## Related Questions

- Probablity - The life time of a certain kind of batteries has a mean life of ...
- Statistics - the manufacturer of a certain brand of auto batteries claims the ...
- Math - The batteries from a certain manufacturer have a mean lifetime of 890 ...
- statistics - A laptop computer manufacturer found that by improving their ...
- stats - A manufacturer of automobile batteries claims that the distribution of ...
- Statistics - An industrial engineer has found that the standard household light ...
- Easy algebra - Mike is testing new batteries to determine if the batteries last ...
- statistics - A manufacturer claims that the mean lifetime of its lithium ...
- Statistics - A battery manufacturer is positive that its AA batteries last for 1...
- intro to probability - For the sheet-metal stamping machine in a certain factory...

More Related Questions