17) A researcher interviews 19 work colleagues who work in his building E) Random B) Systematic D) Cluster A) Stratified C) Convenience Provide an appropriate response. 18) The frequency distribution for the weekly incomes of students with part-time jobs is given below. Construct the corresponding relative frequency distribution. Round relative frequencies to the nearest hundredth of a percent if necessary. Income ($) Frequency 200-300 55 301-400 70 401-500 73 501-600 68 More than 600 10 19) The histogram below represents the number of television sets per household for a sample of U.S. households. How many households are included in the histogram? sot 40 30- Frequency 20 10 - Number of TV Sets Construct the dotplot for the given data. 20) Attendance records at a school show the number of days each student was absent during the year. The days absent for each student were as follows. 0 2 3 4 2 3 4 6 7 2 3 4 6 9 8 10 banbene (A 2