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# Mean and Standard Deviation

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Height of 50 oak trees were measured, but due to problems only partial results were obtained. it was found that 6 trees had a height of less than 9 metres, while 18 trees had a height of less than 15 metres. calculate mean and standard deviation of the heights of oak trees.

##### Solution Summary

Mean and standard deviation are calculated.

##### Solution Preview

A couple assumptions need to be made in order to solve this problem. First, that the total number of trees is not 50 but those measured...so 6+18=24 trees. Second, since we are not given the specifics of any one ...

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