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OpenStudy (anonymous):
The mean and standard deviation height (in cms) for fifty girls in year 10 at a particular school are 164.3 and 7.49 respectively. The mean height for thirty-six boys is 173.5 cm. If 4 boys of the 36 boys in year 10, are shorter than the mean height for girls find the standard deviation of the boys’ heights. Assume all heights are normally distributed.
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OpenStudy (anonymous):
PLZ help i have know idea what to do
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