September 9, 2010 A Class B Tally C Frequency D Percent A B AB O

How to Make a Frequency Table for numerical data. Step 1: –Determine classes. –Find the highest value and lowest value: H= 90 L=37 –Find the Range: = 53 –Determine number of desired classes: 8 –Find the Class Width: Width = Range ÷ # of classes Width = 53/8 = Always round up: 7

Class LimitTallyFrequency Total 35 – – – – – – – – 90

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Highest Temperatures in Each State Highest Value: Lowest Value: Range: Number of Classes: 7 Class Width: Range / # of classes Class Width: Starting Pt: /7 = = 5 100

Class LimitsClass Boundaries TallyFrequency

Finding Class Boundaries Start with first class limit. – Subtract and Add 0.5 to class Limit – = 99.5 – = First class Boundary –99.5 – 104.5

Class LimitsClass Boundaries TallyFrequency II IIIIIIII IIIIIIIIIIIIIIIIII IIIIIIIIIIIII IIIIIII I I – – – – – – – 134.5

Cumulative Frequency Step 1 –Start with Lowest Class boundary –99.5 Step 2 –Count the frequency numbers below it. Step 3 –Use next boundary and continue process < 99.5 < <109.5 < < < < <

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