A machine, which cuts bread dough for loaves, can be adjusted to cut dough to any specified set weight. For any set weight, m grams, the actual weights of cut dough are known to be approximately normally distributed with a mean of m grams and a fixed standard deviation of s grams.
It is also known that the machine cuts dough to within 10 grams of any set weight.
Estimate, with justification, a value for s.
Got no idea. Anyone?
x Turn on thread page Beta
AQA S1 Q Jan 13 Q7a watch
- Thread Starter
- 08-04-2013 19:42
- 08-04-2013 20:41
A good estimate would be that alomost all dough is within 10g of the mean (either side). How many standard deviations either side of the mean contain alomost all the data ?
go from there.