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Measures of Central Tendency of Data in Frequency Tables

Measures of Central Tendency of Data in Frequency Tables. Sometimes lists of data are too big, and data is organised into a frequency table. From a frequency table we can still calculate measures of central tendency. Mean. From a list of data Mean But , from data in a table Mean. Mean.

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Measures of Central Tendency of Data in Frequency Tables

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  1. Measures of Central Tendency of Data in Frequency Tables Sometimes lists of data are too big, and data is organised into a frequency table. From a frequency table we can still calculate measures of central tendency

  2. Mean From a list of data Mean But, from data in a table Mean

  3. Mean Example: The number of children in families

  4. Mode From a table, the mode is just the score with the highest frequency

  5. Median Median is the thscore but to find this we add a cumulative frequency column to our table.

  6. Median Example: Find the median

  7. Mean and Median from Tables On your calculator: Enter data • STAT  (A EDIT) ENTER • Enter the scores (x) into list 1 and the frequencies (F) into list two • 2ndF QUIT  STAT  (C CALC) ENTER  (2 2_Stats)  ENTER  2ndF  L1  ,  2ndF L2  ENTER

  8. Mean and Median from Tables On your calculator: • Calculate Stats • 2ndF QUIT  STAT  (C CALC) ENTER  (1 1_Stats)  ENTER  2ndF  L1  ,  2ndF L2  ENTER

  9. Measures of Central Tendency of Data in GroupedFrequency Tables Sometimes data is grouped into classes. We can still calculate measures of central tendency

  10. Mean Example: Find the mean number of freckles on your right arm

  11. Mode The mode for class data is the class with the highest frequency

  12. Median The median for class data is the class with the middle score

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