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- January 8th 2009, 08:24 PMmr fantastic
- January 8th 2009, 08:25 PMAirjunkie
InvNorm(

*Area to the left**of the value you have,*μ,σ)

Okay so now for q3 would i do

Invnorm(.00000001,30,sqrt of 500) ? - January 8th 2009, 08:36 PMmr fantastic
- January 8th 2009, 08:40 PMAirjunkie
Invnorm(.99,30,sqrt of 500) ?

=82.0187

not sure how that number relates to q3 though... - January 8th 2009, 08:51 PMmr fantastic
- January 8th 2009, 09:26 PMAirjunkie
Thanks again.

2.)91% of the days the train will have to wait

3.) They should delay the train 82.01 minutes so that the probability to wait is .01.

I beleive we've finally made it through this problem eh?