Wednesday

April 1, 2015

April 1, 2015

Posted by **Michelle** on Tuesday, May 1, 2012 at 12:12am.

a. What is the probability that an employee in the assembly division takes longer than 22 minutes to assemble one of these component?

b. What is the probability that the average assembly time for 15 such employees exceeds 22 minutes?

- STAT -
**PsyDAG**, Tuesday, May 1, 2012 at 12:38pma. Use same process as previous post.

b. Because you are dealing with means (average) rather than individual scores:

Z = (score-mean)/SEm

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

**Answer this Question**

**Related Questions**

stat - The average commute time via train from the Chicago O'Hare Airport to ...

statisticss - The time taken by a man to deliver milk is normally distributed ...

probability - suppose that the times taken to complete an online test are ...

Math - The mean time to complete a certain stat quiz is 25 minutes, with a ...

statistics - The time required by workers to complete an assembly job has a mean...

Statistics - The time to fly between New York City and Chicago is normally ...

math - the courier service company has found that their time of parcels to ...

probability - normally distributed with a mean of 40 minutes and a standard ...

math - The time required to finish a test in normally distributed with a mean of...

statistics - a statistics instructor collected data on the time it takes the ...