Industrial Statistics with Minitab

A2.4 Coding and Sorting Data

The file CUSTOMER.MTW contains the turnover (in thousands of euro) of a company's customers during the first quarter of the year. This file is organized as follows:

Column	Label	Content
C1	CUSTOMER	Customer number
C2	JANUARY	Turnover (in thousand euros) in January
C3	FEBRUARY	Turnover (in thousand euros) in February
C5	MARCH	Turnover (in thousand euros) in March

We want to codify the variable CUSTOMER (customer number) according to the customers first quarter purchases using the following categories: less than 50 000 €: category 3; between 50 000 and 100 000 €: category 2, and more than 100 000 € category 1. In addition we also want to know the order of each customer in the ranking of quarterly turnover.

First, calculate the turnover during the first quarter of the year.

Calc > Row Statistics

Then, the total turnover values are codified according to the previously specified categories: Data > Code > Numeric to Numeric

The customer numbers for each category can be placed in separate columns, doing: Data > Unstack Columns

To find ...