Mean = 9.32 Standard Deviation = 1.71 for boys

Mean = 10.04 Standard Deviation =1.83 for girls

What percent of Boys score above 11?

What percent of Girls score above 11?

What percent of Boys score below 8?

What percent of Girls score below 8?

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- Mar 30th 2013, 11:53 AMsds902Percentages using mean and standard deviation
Mean = 9.32 Standard Deviation = 1.71 for boys

Mean = 10.04 Standard Deviation =1.83 for girls

What percent of Boys score above 11?

What percent of Girls score above 11?

What percent of Boys score below 8?

What percent of Girls score below 8? - Mar 30th 2013, 02:05 PMMINOANMANRe: Percentages using mean and standard deviation
SDS give us some more info...

If your mean and standard deviation is the score for an exam..or whatever and the Variable X is normally distributed then you have to standardize it and check from the tables to find the propabilities ...i.e P(Z>11) or P(z<8) etc..... when you get the probabilities multiply them by 100 to get the percentage.....