Recent content by Changoo

I hope someone can tell me where I am going wrong with this dang homework problem. There are several questions to this one problem, but once I figure this out, I will be able to figure the other parts of this question out. Approximately 5% of US Families have a net worth in excess of 1...

Asking for Review I feel confident about my answer, I am hoping someone can review and let me know if I have calculated wrong in any way. :approve:

I meant right**** Sorry :blushing:

Okay, here is what I have, please tell me if I am right: F(x)=1-e^-(20)(2/21) F(x)=1-.850 F(x)=.150 (final answer) I hope I am write.

Thanks for your help, But how do I solve E^-(20)(21)? I know that 20 times 21 is 420. How do I determine e^-420? The book has given me some answers, but none say zero. a. .350, b. .650, c. .150, d. .850 I can probabily figure out the answer with no problem if someone can help me...

I am having a lot of trouble with a homework question from my book. It asks: The time between unplanned shutdowns of a power plant has an exponential distribution with a mean of 20 days. Find the probability that the time between two unplanned shutdowns is more than 21 days. I know this...

36 of 80 teachers at a local school are certified in CPR. In 180 days of school, assuming none of the teachers were ever absent, about how many days is it that the teacher on bus duty will likely be certified in CPR? Can someone give some idea of how to solve this problem. I notice that...