68, 69, 70, 73, 74, 74, 75, 75, 76
Range: highest value - lowest value
Range: 76 - 68 = 18
Median: 74
Lower Quartile: 69.5
Upper Quartile: 75
Interquartile range: lower quartile - upper quartile =
Interquartile range: 75 - 69.5 = 5.5
Range: 18
Interquartile range: 5.5