Using a Cut Point to Define the Samples

Churn propensity scores are applied to accounts at a cellular phone company. Ranging from 0 to 100, an account scoring 50 or above may be looking to change providers. A manager with 50 customers above the threshold randomly samples 200 below it, wanting to compare them on average minutes used per month.

This example uses the file cellular.sav. See the topic Sample Files for more information. Use Independent-Samples T Test to determine whether these groups have different levels of cell-phone usage.

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