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Mathematics 9 Online
OpenStudy (anonymous):

a commercial prawn fisherman recorded the number of prawns he took from each trap. The average number of prawns per trap was 230 with a standard deviation of 22. What number of prawns per trap woud you expect in the interval symmetrical about the mean where 80% of the numbers would be found? Ps. I don't have a graphing calculator and I need to answer the question for an assignment I can email in today. Thus please explain and give the calculations :)

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