Thembisile is interested in becoming an airtime reseller to his fellow
colleagues. He would like to know how much business he can expect from
them. He asked each of his 20 colleagues how many SMS messages they had
sent during the previous day.
The results were: 20, 3, 0, 14, 30, 9, 11, 13, 13, 15, 9, 13, 16, 12, 13, 7, 17,
14, 9 and 13.
Is this data set qualitative or quantitative? Explain your answer.