A collar manufacturer is considering the production of ew type of collar to attract young men. The following statistics of neck cumferences are available based upon the measurements of typical group college students : Mid-value No. of students Mid-value No. of students (inches) (inches) 4 15.0 29 12.5 13.0 13.5 19 30 15.5 18 16.0 16.5 1 63 1 14.0 14.5 66 Compute the mean, the standard deviation and variance.

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