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Mathematics 8 Online
OpenStudy (anonymous):

If you have a test average of 92 and a standard deviation of 1.8, you generally do well on tests. t or f

OpenStudy (czesc):

true

OpenStudy (czesc):

If they are, then more than 99% of your test scores are within three standard deviations of the mean.

OpenStudy (czesc):

You told us that 3-sigma = 5.4 . So less than one score out of every hundred tests you take is lower than 86.6 or higher than 97.4 .

OpenStudy (czesc):

long story short true

OpenStudy (anonymous):

thnxs

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