Posted by **suhad** on Friday, February 22, 2013 at 7:04am.

3. In a sample of 64 students given an examination in statistics, it is found that the mean weight is 57 kg with standard deviation 9 kg. Find :

ƒÜ i) The proportion of students weight 48-62 kg.

ƒÜ ii) The proportion of those less than 72 kg.

ƒÜ iii) The proportion of those less than 50 kg ?

ƒÜ iv) If the highest 5% of are over-weight, what is the Minimum score for an over-weight.

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