Which of the following data sets has the smallest range

Question

{324, 318, 367, 312, 389, 337}

{148, 145, 117, 148, 199, 172}

{37, 19, 40, 54, 75, 68}

{50, 30, 10, 0, 80, 100}

Answer 1

{37, 19, 40, 54, 75, 68}