Example 11. A collar manufacturer is considering the production of a new type of collar to attract young men. The following statistics of neck circumferences are available based upon the measurements...

Extracted text: Example 11. A collar manufacturer is considering the production of a new type of collar to attract young men. The following statistics of neck circumferences are available based upon the measurements of typical group of college students : Mid-value No. of students Mid-value No of students (inches) (inches) 15.0 15.5 16.0 4 29 12.5 13.0 13.5 14.0 14.5 19 18 30 1 63 16.5 1 66 Compute the mean, the standard deviation and variance.