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4.4central Tendencies
 

4.4central Tendencies

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    4.4central Tendencies 4.4central Tendencies Presentation 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
    • Answers
      • Mean = 17
      • Median = 18
      • Mode = 19
      • Range = 17
      6 12 15 16 17 18 19 19 19 23 23
    • Assignment
      • Page 190:
        • 44 -53; 54, 56