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Published byRandell Hardy Modified over 6 years ago
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6.5 – Measures of Central Tendency for Discrete and Continuous Data
By Daniel Christie
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Homework Page 304
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Vocabulary in Simple Discrete Data
Mode- most frequent value Median- middle value Mean- sum of all values/the number of values ‘sideways M’ – the sum of…
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Example Number Set- 6 8 3 2 6 5 1 6 8 Find the mode, median, and mean.
Mode= 6 [it occurs 3 times] Median= 6 [it is the middle number] Mean= 5 [( )/9=45/9=5]
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Vocabulary in Discrete data in a Frequency data
Mode- value of highest frequency Median- middle value Mean- (value x frequency)+(value+frequency)/sum of the frequencies
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Example Mode= 4 [has highest frequency] Median= 4 [1/2(80+1)]
X [value] F [frequency] 1 4 2 9 3 23 25 5 16 6 Mode= 4 [has highest frequency] Median= 4 [1/2(80+1)]
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Vocabulary in Grouped Discrete or Continuous Data
Modal Group- group having the largest frequencies Median- estimated middle value
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Example Modal Group= 80<t<90 [has the highest frequency]
Time [t=minutes] Frequency 0<t<50 20 50<t<60 61 60<t<70 83 70<t<80 90 80<t<90 106 90<t<100 62 100<t<110 49 110<t<120 29 Modal Group= 80<t<90 [has the highest frequency] Median= 250 [half of the total value] – 164 [sum of first 3 frequencies] = 86. So, the mean is 70<t<80* *I think the book is wrong. It should be 80<t<90
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Picture Credit: Daniel Christie
Thank You. Picture Credit: Daniel Christie
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