Posted by **Lo** on Wednesday, April 27, 2011 at 1:17pm.

A consumer buys n light bulbs, each of which has a lifetime that has a mean

of 800 hours, a standard deviation of 100 hours, and a normal distribution. A light bulb is replaced by another as soon as it burns out. Assuming independence of the lifetimes, find the smallest n so that the succession of light bulbs produces light for at least 10,000 hours with a probability of 0.90.

## Answer this Question

## Related Questions

- Math - A consumer buys n light bulbs, each of which has a lifetime that has a ...
- statistics - Solve the problem. The lifetime of a new brand of light bulb can be...
- math - 1) A light bulb producing company states that its lights will last an ...
- statistics - A new extended-life light bulb has an average service life of 750 ...
- Statistics - A company has developed a new type of light bulb, and wants to ...
- statistics, help - Can someone help me which way can I approach this problem. A ...
- Statistics - Can anyone tell me how to use TI-84 calculator to solve this ...
- statitics - a light bulb manufacture gaurentees that the mean life of a certain ...
- statisitics - A company installs 5000 light bulbs, each with an average life of ...
- stat - A company installs 5000 light bulbs, each with an average life of 500 ...