Answer
Minimum=108
First quart=129
Median=147
3rd quart=167
Max=188
Work Step by Step
You have the values :108,117,125,129,131,133,142,147,150,155,162,167,174,175,18.
The minimum is the least value which is 108.
The median is the middle value which is 147.
The maximum is the greatest value which is 188.
The first quartile is the middle value between the minimum and the median(108,117,125,129,131,133,142).The first quartile is 129.
The third quartile is the middle value between the median and the maximum(150,155,162,167,174,175,188). The third quartile is 167.
Use this to make a box and whisker plot.