The contingency table below gives the counts of students by activities and gender. Band Sports Debate Total Male 105 320 7 432 F
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Solution: We are given that the minimum age required is 18 and the maximum age required is 45.
The range rule of thumb states that range is about four times the standard deviation.
Where s denotes the standard deviation.
Therefore, using the range rule of thumb, the standard deviation is 6.75