1. Frequency Tables and Data This represents all of the earthquakes above 6.0 on the Richter Scale between Feb 1, 2005 and Mar. 30, 2005 6.3 6.6 6.0 7.1 6.1 6.8 6.0 6.3 6.4 6.1 6.6 6.6 6.5 6.4 6.0 6.8 7.1 6.2 6.2 6.0 6.2 6.1 6.3 6.6 7.2 6.4 6.2 8.7 6.0 6.1 BinsTallyFreqRel. Freq.Cuml. Freq. Rel. Cuml. Freq. Totals 6.0-6.5 6.5-7.0 7.0-7.5 7.5-8.0 8.0-8.5 8.5-9.0 |||| |||| |||| |||| |||| || ||| | 19 7 3 0 1 30 19/30=0.63 7/30 =0.23 3/30=0.10 0/30=0.00 1/30=0.04 1 19 26 29 30 0.63 0.87 0.97 1

2. Single Variable Data Any time a attribute is measured repeatedly, this forms a Single Variable Dataset. For example measuring the height of everyone in the class creates a single variable dataset (height is the attribute measured repeatedly). Or measuring the mass of 200 pennies creates a single variable data set (mass is the attribute measured repeatedly. Once you have that data you can now start to summarize it graphically (histogram, dot plot, box plot, pie graph etc).

3. Displaying Single Variable Data

5. Summary Statistics Most earthquakes had a magnitude of between 6.0 and 6.5. 63% of the earthquakes had magnitude between 6.0 and 6.5 There were approximately twice as many earthquakes between 6.5 and 7.0, compared to between 7.0 and 7.5. Other summary stats