Press option #3 "Lists and Spreadsheets" from your home screen. Begin by typing in each numerical data sample and pressing "Enter" after each one. When you have entered all of the data, scroll to the top of the column and enter the name of your list. Your name will need to be short, but also descriptive enough for you to find later.
Press the "Home" key and now select option #5 "Data and Statistics." A generic graph will be showing at this time. Scroll into the middle of the screen until you see the words "Click to add Variable" at the bottom of the screen. Click and then choose "num" from the options that are shown.
Press "ctrl" "Menu" and change the dot plot graph to "Box and whisker." As you move your cursor around the graph you will be able to view the minimum, Q1, Q2, Q3, and maximum from the data you entered at the beginning.