Statistics Data Analysis Worksheet
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Statistics Data Analysis Worksheet
Reading and Analysing Data
At a hardware store, Ngaio measured the lengths in millimetres of 20 small fasteners from a display tray. The measurements were: 12, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22, 38.
- Approximately symmetrical
- Positively skewed, with a tail towards larger values
- Negatively skewed, with a tail towards smaller values
- Evenly spread, with no tail
Organising and Displaying Data
Use the fastener measurements given above for each task.
Length interval (mm)
Frequency
10–14
15–19
20–24
25–29
30–34
35–39
Interpreting the Results
Refer to the fastener measurements listed in the first section.
3 printable pages
Page 1
Page 2
Page 3
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