Final answer:
The range is 3, the median is 7, and the IQR is 1.
Step-by-step explanation:
The range is the difference between the largest and smallest values in the data set. In this case, the range is 3, as the largest value is 9 and the smallest value is 6.
The median is the middle value of the data set when it is arranged in ascending order. In this case, the median is 7.
The IQR (interquartile range) is the difference between the third quartile (Q3) and the first quartile (Q1). It represents the spread of the middle 50% of the data. In this case, the IQR is 1, as Q1 is 6 and Q3 is 7.