4[1].4central Tendencies
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4[1].4central Tendencies

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4[1].4central Tendencies 4[1].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