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# 4[1].4central Tendencies

## on Sep 18, 2008

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## 4[1].4central TendenciesPresentation Transcript

• Measures of Central Tendencies Mean Average Mode Average Median Average Range
• New Data Relates to Loss in Productivity
• 40% of all absences- due-to-illness in the work place occur on Mondays and Fridays reducing effectiveness of the business staff.
• If you were the boss, what would you do?
• You can say anything with numbers
• 1 day = 1/5 or 20% of the work week.
• 2 days = 2/5 or 40%
• Would you expect illnesses’ absences to occur equally during the week?
• You can make the same statistics sound positive or negative.
• Only 2/5 of all absences in this company occur on Mondays or Fridays
• If you were the boss, how would you feel?
• A Review
• Mean
• Median
• Mode
• Order the numbers from least to greatest.
• The number that occurs in the middle is the median;
• the one that occurs the MOST is the mode
*Total the numbers *Divide by the number of data
• Find the mean
• 2
• 5
• 3
• 6
• 12
• 9
• 1
• 4
• 2
• 4
• Total : 48
• Find the median and mode
• Line up the numbers in chronological order
• Mean : 4.8
• Median:
• Mode:
2 5 3 6 12 9 1 4 2 4
• Find the median and mode
• Line up the numbers in chronological order
• Mean : 4.8
• Median:
• Mode:
2 5 3 6 12 9 1 4 2 4 4 Find the middle of the list.
• Find the median and mode
• Line up the numbers in chronological order
• Mean : 4.8
• Median:
• Mode:
2 5 3 6 12 9 1 4 2 4 Find the number or numbers that occur the most often. 4 2 an 4
• Find the range
• Mean : 4.8
• Median:
• Mode:
• Range:
2 5 3 6 12 9 1 4 2 4 Subtract the lowest from the highest number 4 2 an 4 12 – 1= 11
• Find the mean, median, mode, and range
• 16
• 23
• 19
• 6
• 15
• 17
• 18
• 12
• 19
• 23
• 19
6 12 15 16 17 18 19 19 19 23 23