CELLULAR PHONE BILLS

1
CELLULAR PHONE BILLS

• a descriptive statistical survey, done in the
  texting capital of the Philippines.

2
Project mission

• What survey monthly cellular phone bills
• Who 106 freshmen
• Where Ateneo de Manila University
• When March 8, 2002

3
The team

• Tambok Arandia
• Coco Lee Chua
• Snow White Massab
• Jane Dale Racines
• Dulaang Sibulo
• Megastar Uy

Bosing Osang Berdan
4
The gathered data
5
Grouping the data
6
Statistical computations
7
The histogram
8
The ogive
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Analysis

• Based on raw scores, the average cell phone bill
  of the freshmen is P1033.04.
• Based on grouped data, the average cell phone
  bill of the freshmen is P1092.45
• The modal class is the interval P500-P900. This
  means that among all the intervals, this is the
  interval with the most frequency.
• Most of the freshmen surveyed (73.58) spend
  P100-P1300 on their cell phones each month. Only
  26.41 of those surveyed spend more than P1300
  monthly.
• None of the freshmen surveyed spend in the
  interval P2100 P2500.

10
More analysis

• The mode is P1000. This means that a lot of the
  freshmen spend P1000 monthly.
•  
• The freshmen show a wide range of monthly cell
  phone bills, the lowest bill being only P100
  while the highest bill being P4000.
•  
• Using raw scores, the standard deviation is
  779.13. This means that on the average, we would
  expect that most of the cell phone bills of the
  freshmen would be P1033.04 ? P779.13 or will fall
  within P253.91 P1812.17. The large value of the
  standard deviation indicates that the
  observations (cell phone bills) are more
  scattered from the mean.
• Using grouped data, the standard deviation is
  805.61. This means that on average, we would
  expect that most of the cell phone bills of the
  freshmen would be P1092.45 ? P805.61 or will fall
  within P286.84 - P1898.06. The large value of the
  standard deviation once again indicates that the
  observations (cell phone bills) are more
  scattered from the mean.

11
Happy birthday, Sha!!!

• Monday, March 18, 2002
• THATS ALL FOLKS!!!