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Normal distribution-standard deviation

RRania5y ago
The proof reader of a publishing company has estimated that the average number of typing errors per page is 2.5, with 82% of pages having between 1.5 and 3.5 errors. If the errors per page are normally distributed, what is the standard deviation?
P2-D2P2-D2Tutor5y ago#1
Hi, How is this relevant to the F1 exam? I don't think that is is, so cannot answer your query. Sorry. Thanks
RRania5y ago#2
My apologies ,I submitted it to the wrong forum ,it is for BA2. Thank you
P2-D2P2-D2Tutor5y ago#3
Ha! No worries, easily done and hope you got your answer in the BA2 forum. Good luck with the exam.
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