Analyzing quantitative data

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Analyzing quantitative data . Blind men and an elephant - Indian fable. Things aren’t always what we think!

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### Analyzing quantitative data

Blind men and an elephant

- Indian fable

Things aren’t always what we think!

Six blind men go to observe an elephant. One feels the side and thinks the elephant is like a wall. One feels the tusk and thinks the elephant is a like a spear. One touches the squirming trunk and thinks the elephant is like a snake. One feels the knee and thinks the elephant is like a tree. One touches the ear, and thinks the elephant is like a fan. One grasps the tail and thinks it is like a rope. They argue long and loud and though each was partly in the right, all were in the wrong.

For a detailed version of this fable see: http://www.wordinfo.info/words/index/info/view_unit/1/?letter=B&spage=3

Complex analysis and big words impress people.

Most people appreciate practical and understandable analyses.

Analysis comes at the end after all the data are collected.

We think about analysis upfront so that we HAVE the data we WANT to analyze.

Quantitative analysis is the most accurate type of data analysis.

Some think numbers are more accurate than words but it is the quality of the analysis process that matters.

Common myths
Common myths cont…
• Data have their own meaning.
• Data must be interpreted. Numbers do not speak for themselves.
• Stating limitations to the analysis weakens the evaluation.
• All analyses have weaknesses; it is more honest and responsible to acknowledge them.
• Computer analysis is always easier and better.
• It depends upon the size of the data set and personal competencies. For small sets of information, hand tabulation may be more efficient.
Quantitative data analysis is making sense of the numbers to permit meaningful interpretation

It involves:

• organizing the data
• doing the calculations
• interpreting the information
• lessons learned
• explaining limitations
1. Organizing the data
• Organize all forms/questionnaires in one place
• Check for completeness and accuracy
• Remove those that are incomplete or do not make sense; keep a record of your decisions
• Assign a unique identifier to each form/questionnaire
• By hand
• By computer
• Microsoft Access (database mngt)
• Quantitative analysis: SPSS (statistical software)
2. Do the calculations

See the booklet, Analyzing Quantitative Data for help with how to do each of these calculations

• Count (frequencies)
• Percentage
• Mean
• Mode
• Median
• Range
• Standard deviation
• Variance
• Ranking
• Cross tabulation

http://learningstore.uwex.edu/pdf/G3658-6.pdf

3. Interpreting the information

Numbers do not speak for themselves.

For example, what does it mean that 55 youth reported a change in behavior. Or, 25% of participants rated the program a 5 and 75% rated it a 4. What do these numbers mean?

Interpretation is the process of attaching meaning to the data.

Interpretation demands fair and careful judgments. Often the same data can be interpreted in different ways. So, it is helpful to involve others or take time to hear how different people interpret the same information.

Think of ways you might do this…for example, hold a meeting with key stakeholders to discuss the data; ask individual participants what they think

• Are there any ‘ah-has’? What is new? What was expected?
• Were there findings that surprised you?
• Are there things you don’t understand very well – where further study is needed?

We often include recommendations or an action plan. This helps ensure that the results are used.

4. Discuss limitations

Written reports:

Oral reports:

• Be prepared to discuss limitations