mean and standard deviation

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mean and standard deviation
Message posted by b king on January 18, 2001 at 12:00 AM (ET)

Where would i find data to answer problems like this? The weight of boxes, has mean of 450 grams, stan deviation of 2 grams, what % of boxes weigh less than 448 grams?

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Re: mean and standard deviation
Message posted by co la la on January 19, 2001 at 12:00 AM (ET)

I think this question should refer to normal distribution.
Pls try to find the answer in this way.

Re: mean and standard deviation
Message posted by Loreen on January 22, 2001 at 12:00 AM (ET)

You need to look at the distribution sector of a book. (normal distribution.) Try this onine book. http://www.cne.gmu.edu/modules/dau/stat_idx_frm.html

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