Posted by **br0Ok3** on Friday, October 15, 2010 at 1:14am.

–/3 points Notes Question: TanColM7 8.6.003.

TKK Products manufactures electric light bulbs in the 50-, 60-, 75-, and 100-watt range. Laboratory tests show that the lives of these light bulbs are normally distributed with a mean of 774 hr and standard deviation of 68 hr. Find the probability that a TKK light bulb selected at random will burn for the following times. Round your standard normal variable to two decimal places before using the table of values. (Give your answers to four decimal places.)

(a) less than 842 hr

(b) between 842 and 910 hr

(c) more than 638 hr

## Answer this Question

## Related Questions

- statistics - –/3 points Notes Question: TanColM7 8.6.003. TKK Products ...
- Math - Daphne replaced light bulbs in her mothers store.She had 3/4 of a box of ...
- Physical Science, ipc - Which can you do to reduce the power consumption in your...
- sTATISTICS - If light bulbs have lives that are normally distributed with a mean...
- algebra 1 - On a restaurant sign, 14 light bulbs must be replaced. These light ...
- stats - If light bulbs have lives that are normally distributed with a mean of ...
- Probability - A company produces light bulbs, and finds that approximately 2% of...
- Physics - Iceland uses a voltage of 220v instead of of the US 110v. So you fly ...
- Physic - CFL light bulbs consume less power than their incandescent counterparts...
- Statistics - If light bulbs have lives that are normally distributed with a mean...

More Related Questions