Question

Which interval describes the number of hours spent studying in a typical week for about 50% of the students sampled?
2 to 9
9 to 14
9 to 20
14 to 20
A five number summary of respones is:
2,9, 14, 20, 60

Answer 1

A five-number summary represents the following qualifiers:
minimum
Q1
median
Q3
maximum

the interval minimum/median represents 50% of the data in the lower half.
the interval median/maximum represents 50% of the data in the upper half.
the interval Q1/Q3 represents 50% of the data in the middle half, which better represents the population.

So choose the appropriate interval and post your answer for a check if you wish.