To choose a starting interval, be sure that it includes the lowest number (in this case 109). ∴good starting interval is 100.5-120.5 (note: this is 20 units long with an extra decimal place added) Step 3: Sort the data in a table Interval Tally Frequency Cumulative Frequency 100.5-120.5 IIII 4 4 120.5-140.5 III 3 7 140.5-160.5 III 3 10 160.5-180.5 IIIII 5 15 180.5-200.5 0 15 200.5-220.5 I 16 Note:*Keep counting your intervals by twenty until you’ve included the last number (in this case, 217). *A cumulative frequency column in a good way to double check that you didn’t miss any entries. b)Organize data in graphical form. 123456No_wet_days110.5130.5150.5170.5190.5210.5freq(±)±sumStatsLesson1Bar ChartNotes:*The y-axis is frequency If you are planning on graphing in Fathom, note: 1. As you are dropping the x column onto the empty graph, hold down the shift key just before you let it drop, this will create a bar graph. 2. You must change the formula at the bottom from "count" which is the default to "sum" by clicking on the word count and typing over it. A break should be included in
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