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The third quartile and 65th percentile for the following data are Profits in '000 : les than 10 10-19 20-29 30-39 No. of firms: 5 18 38 20 40-49 9 50-59 2?
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The third quartile and 65th percentile for the following data are Prof...
Calculation of Third Quartile and 65th Percentile for Profit Data


Data


  • Less than 10: 5 firms

  • 10-19: 18 firms

  • 20-29: 38 firms

  • 30-39: 20 firms

  • 40-49: 9 firms

  • 50-59: 2 firms



Step 1: Arrange Data in Ascending Order

We need to arrange the data in ascending order to calculate the quartiles and percentiles.


  • Less than 10: 5 firms

  • 10-19: 18 firms

  • 20-29: 38 firms

  • 30-39: 20 firms

  • 40-49: 9 firms

  • 50-59: 2 firms



Step 2: Calculate Quartiles

The third quartile, denoted by Q3, is the value below which 75% of the data falls. To calculate Q3:


  • Find the total number of firms: 5 + 18 + 38 + 20 + 9 + 2 = 92

  • Calculate 75% of the total number of firms: 0.75 x 92 = 69

  • Starting from the smallest value, count the number of firms until you reach the 69th firm. The value corresponding to that firm is the third quartile.

  • In this case, the third quartile falls in the 40-49 range. So, Q3 = 49



Step 3: Calculate Percentiles

The 65th percentile is the value below which 65% of the data falls. To calculate the 65th percentile:


  • Find the total number of firms: 5 + 18 + 38 + 20 + 9 + 2 = 92

  • Calculate 65% of the total number of firms: 0.65 x 92 = 59.8

  • Starting from the smallest value, count the number of firms until you reach the 60th firm. The value corresponding to that firm is the 65th percentile.

  • In this case, the 65th percentile falls in the 40-49 range. So, the 65th percentile = 49



Conclusion

The third quartile for the profit data is 49 and the 65th percentile is also 49.
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The third quartile and 65th percentile for the following data are Profits in '000 : les than 10 10-19 20-29 30-39 No. of firms: 5 18 38 20 40-49 9 50-59 2?
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