Answer:9
Explanation:
90,84,100,87,92,96,88
arrange in ascending order
84,87,88,90,92,96,100
First we find the median which is their middle number,median=90
Then we find the median in the lower half,
Lower half=84,87,88
Median of lower half=87
We also find the median in The upper half,
Upper half=92,96,100
Median of upper half=96
Interquartile range=median in upper half - median in lower half
Interquartile range=96-87
Interquartile range=9