Data Analysis and Charts (Graphs)
​See STATISTICS and DATA: 

Numbers don't lie, but you can lie with numbers"
Numbers may be manipulated to persuade or convince.

BAR CHART
HISTOGRAM
FREQUENCY CHART
PIE CHART (Circle Graph)
LINE CHART
SCATTER PLOT
TABLES
BOX PLOT (Box and Whisker)


Low: Minimum:  Smallest Value
High: Maximum: Largest Value
Range: Spread: (High - Low)

Example 1:  10, 12, 20, 24
The Low (Minimum) is: 10
The High (Maximum) is: 24
The Range is: 14 (24 - 10)
Mean (Average) = (10 + 12 + 20 + 24) / 4 = 66/4 = 16.5  Be carful that the result is "Meaningful". If this was "Boys in a class", the mathematical answer is 16.5. However, you cannot have 1/2 a boy!
Median is the Middle. There are 4 data values:  the middle is between 12 and 20: (12 + 20)/2 = 32/2 = 16
Mode: None

Example 2:  75, 77, 80, 84, 94
The Low (Minimum) is: 75
The High (Maximum) is: 94
The Range is: 19 (94 - 75)
Mean (Average) = (75 + 77 + 80 + 84 + 90) / 5 = 410/5 = 82
Median is the Middle. There are 5 data values:  The middle Value Point is (1 + 5)/2 = 6/2 = 3. The Third value in the list is 80.
Mode: None




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Revised: April 24, 2024