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Data Preparation, Entry and Exploration
Samuel K. Frimpong (PhD)
Outline of Presentation
Preparing Data
Inputting and Checking Data Exploring Data
Presenting Data
Introduction to Microsoft Excel
Data Preparation for Analysis
As part of preparing your data for analysis, the following should be considered. That is, if you did not consider them before obtaining the data.
1. Type of data (level of numerical measurement)
2. Format in which the data will be input to the data analysis software
3. Impact of data coding on subsequent analyses (for different data types)
4. Need to weight cases
5. Methods you intend to use to check data for errors
Data Entry
Invariably, all format” called
analysis software accept data in “table “Data Matrix”
Some primary data collection methods such as CAPI, CATI and online questionnaires can automatically enter and save data in this format.
Some secondary data also be saved in this type.
accessed from CD-ROMS can format without the need to re-
For other data collection methods, you would have to enter the data manually in the data matrix form.
Data Matrix
Typically, data matrix has rows and columns
Each column represents separate variables and each row contains the variables for an individual case
id Variable 1 (age)
Variable 2 (gender)
Variable 3 (level of education)
Variable 4 (marital Status)
Case 1 1 27 1 2 1 Case 2 2 19 2 1 2 Case 3 3 24 2 3 1
...
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