How do you know when it is a positive and negative z value for part c. Is it something to do with the bell graph? Could someone please explain this, thanks.
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- Thread Starter
- 17-05-2015 12:12
Offline21ReputationRep:Very Important Poster
- Very Important Poster
- 17-05-2015 12:56
If you sketch it and look at what values you need it'll give you an idea of whether z is negative or positive.
If 1% of the values have to be less than 5m (or if you like, 99% of the values are greater than 5m), where will the 5m point be on the graph?