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We’re going to construct a frequency histogram from the data. The data ranges from 15.4 to 31.2
so we will have our classes go from 15 to 33. That is a range of 33 − 15 = 18, so we will
construct six classes of width 3.
Go into the Stat List Editor and create a new list called WORK. Enter the times.
Press the STAT key.
Press the number 1 key.
Press the 2
nd
key and then the DEL key to get to INS.
Type in WORK and then press the ENTER key.
Enter the data values.
Press the 2
nd
key and then the Y= key to get to the
STAT PLOT page.
Make sure that only one statistic plot is turned on
and go into that plot.
Turn the plot On.
Select the third icon in the first row for Type.
Type WORK for Xlist.
Leave Freq as 1.
Press the WINDOW key.
Set Xmin to 15 and Xmax to 33.
Set Xscl to 3.
Set Ymin to 0 and Ymax to 25.
Press the GRAPH key.
To get the class and frequency information to appear
press the TRACE key.
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