Question

Find the range and the first and third quartiles for the data set.
26, 27, 73, 78, 57, 46, 90

Answer 1

Firstly arrange the data pont from smaller to larger:


22------27--------46--------57------------73------------78---------------90
1st Q Median 3rd Q

Total Range : 90-22 = 68
Interquartile range: Q₃ - Q₁ = I = 78 -27 = 51
I hope the above is self explanatory