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#2 Help Me ! » arrrgghhhh!!! normal distributions???? » 2005-04-24 03:10:11

supastar
Replies: 2

a large number of observations follow a normal distribution with a mean of 120 and a standard deviation of 80. What proportion of observations is:
i) below 100
ii) above 130
iii) between 100 and 130
iv) between 130 and 140
v) between 115 and 135??

anyone have an ideas because I certainly dont

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