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Measures of Central Tendency (Contd…)

Measures of Central Tendency (Contd…). Prepared by: Bhakti Joshi Date: November 28, 2011. Frequency distribution of Weights in Pounds of a sample of packages. 15.2. Monthly Average Cash Balances of 600 customers. 142.25. Median. …Central Item of a data set. (N+1) /2 = M

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Measures of Central Tendency (Contd…)

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  1. Measures of Central Tendency (Contd…) Prepared by: Bhakti Joshi Date: November 28, 2011

  2. Frequency distribution of Weights in Pounds of a sample of packages 15.2

  3. Monthly Average Cash Balances of 600 customers 142.25

  4. Median …Central Item of a data set (N+1) /2 = M N = Number of observations M= Median

  5. Median Interpretation?

  6. Estimated median weight of the fish caught Item or number that represents median 383+1 / 2= 192nd item Class that contains the median item 70 – 79.5 Width of the weights interval 9.5 Estimated median value? (192 – (181+1) 84 * 9.5 + 70 = 71.13

  7. Mode …Value that is repeated most often in the data set. Mode is not used for ungrouped data Interpretation?

  8. Relationship between Mean-Median-Mode • Mean < Median < Mode = Negatively (left) Skewed • Mean> Median> Mode = Positively (right) Skewed • Mean = Median = Mode = Normal

  9. Normal Positively (right) Skewed Negatively (left) Skewed

  10. Projects Stock Prices of Companies representing any one of the following industries listed on the BSE or NSE • Textiles • Banking • Automobiles • IT/Telecommunication • Pharmaceutical • Foods & Beverages • Infrastructure • Steel • Oil & Gas • Chemicals

  11. Project Requirements • Select 2 or more stocks of representative industry • Stock prices of minimum 100 data points each • Background of the representative companies • Names • Industry • Occupation (Trading, manufacturing, distribution, etc) • Products/services • Customers • Select statistical tools to compare and analyze the trends and performance of the stocks in the stock market

  12. Email: bhaktij@gmail.comWebsite: www.headscratchingnotes.net

  13. Frequency and Distribution Curve

  14. Geometric Mean

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