Instructions Refer to the following distribution of commissions; Monthly Commissions Class Frequencies $600 up to $800 $800 up to $1,000 $1,000 up to $1,200 11 $1,200 up to $1,400 22 $1,400 up to $1,600 40 $1,600 up to $1,800 24 $1,800 up to $2,000 9 $2,000 up to $2,200 What is the relative frequency for salespeople who earn from $1,600 up to $1,800