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idioteque
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the test scores for a large statistics class have an unknown distribution with a mean of 70 and a standard deviation of 10
find k so that at most 10% of the scores are more than k standard deviations above the mean.
I'm a bit confused by the question it self.
does the question means :
1-1/k^2 = 0.1
k = 1.05
or
1-1/k^2 = 0.2
k = 1.12
or
1-1/k^2 = 0.8
k = square root 5 = 2.23
pls help, thanks in advance.
find k so that at most 10% of the scores are more than k standard deviations above the mean.
I'm a bit confused by the question it self.
does the question means :
1-1/k^2 = 0.1
k = 1.05
or
1-1/k^2 = 0.2
k = 1.12
or
1-1/k^2 = 0.8
k = square root 5 = 2.23
pls help, thanks in advance.
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