Practice, difficulty 2 of 3
Quartiles and IQR
A pharmacy logged the time (minutes) to fill ten prescriptions:
68, 18, 98, 81, 41, 47, 42, 88, 34, 64
Using the type 7 method, find , and the interquartile range. Give each to 2 decimal places.
Practice
Practise until it sticks
Choose a topic, a skill or a difficulty. Calculation exercises have new versions with fresh numbers once you have solved them, so you can practise the method rather than memorise an answer.
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