By taking random samples over a period of time, information on the following age distribution of young members attending a sport and ...

     By taking random samples over a period of time,   information on the following age distribution of young members attending a   sport and recreation center was collected       Age   NO. of persons   12   and under 13 3   13   and under 14 11   14   and under 15 29   15and   under 16 99   16   and under 17 203   17   and under 18 258   18   and under 19 247       Calculate   to the nearest tenth the   a) mean.    b)   median.   c) mode.    d)   variance.   e)   standard deviation.