Imagine you are the Ghost of Pheidippides. Write the whole story of the Battle of Marathon from your point of view.
1 answer:
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If 
were incorrect, it means that 
were correct
There were 28 problems ;)
There were 28 problems ;)
A suitable probability calculator will tell you that probabilty is about 25.9%.
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The normalcdf function on this calculator gives an area between a lower and upper limit. If the upper limit is more than about 8 standard deviations above the mean, the 10th decimal place is unaffected. Since the standard deviation here is about 5, we need to have an upper limit that is about 40 above the mean of about 30. We have chosen 80 as a nice round number and to give a little more margin.
