Answer:
Explanation:
The first step is to rearrange the data in ascending order. It becomes
1, 3, 5, 5, 6, 6, 7, 7, 7, 8, 9
Recall,
interquartile range, IQR = Q3 - Q1
where
Q1 is the lower quartile
Q3 is the upper quartile
Position of Q1 = 0.25(n + 1)
where
n = number of values = 11
Position of Q1 = 0.25(11 + 1) = 3
T
