Asked by Michelle
Electricalc has determined that the assembly time for a particular electrical component is normally distributed with a mean of 20 minutes and a variance of 9 minutes.
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?
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?
Answers
Answered by
PsyDAG
a. 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.
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.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.