Posted by **Kim** on Sunday, April 29, 2012 at 10:58pm.

The University of Southern Mississippi currently uses GE brad fluorescent light bulbs that have a mean life of 900 hours. Sylvania clams that its new fluorescent bulbs, that cost the same as the GE bulbs, last longer than the GE brand. A sample of 50 Sylvania bulbs produces a sample mean of 940 significance level to support Sylvania's claim?

- Statistics 2 (incomplete) -
**PsyDAG**, Monday, April 30, 2012 at 11:50am
An estimate of variability (e.g., standard deviation) is needed.

- Probability and Statistics 2 -
**Kim**, Monday, April 30, 2012 at 2:51pm
The University of Southern Mississippi currently uses GE brad fluorescent light bulbs that have a mean life of 900 hours. Sylvania clams that its new fluorescent bulbs, that cost the same as the GE bulbs, last longer than the GE brand. A sample of 50 Sylvania bulbs produces a sample mean of 940 hours and a sample standard deviation of 70 hours. Is there enough evidence at the alpha = 0.05 significance level to support Sylvania's claim?

## Answer This Question

## Related Questions

- Statistics - An industrial engineer has found that the standard household light ...
- probability and statistics - An electrical firm manufactures light bulbs that ...
- English - 1. There are many fluorescent lights on the ceiling. 2. There are many...
- math - You are thinking of making your mansion more energy efficient by ...
- sTATISTICS - If light bulbs have lives that are normally distributed with a mean...
- Business Statistics - The quality control manager at a light bulb factory needs ...
- Statistics - If light bulbs have lives that are normally distributed with a mean...
- statistics - If light bulbs have lives that are normally distributed with a ...
- statistics - A manufacturer of light bulbs has sampled 40 bulbs in order to ...
- Probability Statistics - a manufacturing plant uses 3000 light bulbs whose ...

More Related Questions