Assessment Task 2: Data exploration and preparation
This assignment is individual work. Each of you will be working with an individual dataset that you can download from the link below.
You have just started working as a data miner/analyst in the Analytics Unit of a company. The Head of the Analytics Unit has brought you a dataset [a welcome present ;-))]. The dataset includes two files: a description of the attributes and a table with the actual values of these attributes. The Head of the Analytics Unit has mentioned to you that this is some sort of demographic data that a potential client has provided for analysis. The Head of the Analytics Unit would like to have a report with some insights about that data, that he/she could deliver to the client. Your tasks include:
The tasks in the assignment are specified below.
For this dataset you only have the attribute headings and a brief of what they mean, which you can find here: Attribute_Description_Assignment2.docx. Each student is assigned an individual table with the actual values of these attributes. You will find your individual dataset in this zip file: Datasets.zip , with your student ID as the filename.
1A. Initial data exploration
Present your findings in the assignment report.
1B. Data preprocessing
Perform each of the following data preparation tasks (each task applies to the original data) using your choice of tool:
1. Use the following binning techniques to smooth the values of the PRICE attribute:
In the assignment report, for each of these techniques you need to illustrate your steps. In your Excel workbook file place the results in separate columns in the corresponding spreadsheet. Use your judgement in choosing the appropriate number of bins - and justify this in the report.
2. Use the following techniques to normalise the attribute PRICE:
In the assignment report provide explanation about each of the applied techniques. In your Excel workbook file place the results in separate columns in the corresponding spreadsheet.
3. Discretise the AYB attribute into the following categories: Very Old=0-1850; Old=1851-1950; New=1951-2000; Very New= 2000+. Provide the frequency of each category in your dataset.
In the assignment report provide an explanation of each of the applied techniques. In your Excel workbook file place the results in a separate column in the corresponding spreadsheet.
4. Binarise the CNDTN_D variable [with values "0" or "1"].
In the assignment report provide explanation about the applied binarisation technique. In your Excel workbook file place the results in separate columns in the corresponding spreadsheet.
At the end of the report include a summary section in which you summarise your findings. The summary is not a narrative of what you have done, but a condensed informative section of what you have found about the data that you should report to the Head of the Analytics Unit. The summary may include the most important findings (specific characteristics (or values) of some attributes, important information about the distributions, some clusters identified visually that you propose to examine, associations found that should be investigated more rigorously, etc.).
The deliveries are:
In the report, include a section (starting with a section title) for each of the tasks in the assignment.
Your report will likely be 20-25 pages in length using an 11 or 12 point font, including title page and graphs. On average you will require between 15 and 23 hours to complete this assignment.
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