Case Study : The problem is to reduce churn ratio by 5% quarterly by analyzing C
ID: 3822926 • Letter: C
Question
Case Study: The problem is to reduce churn ratio by 5% quarterly by analyzing CDR, credit report and billing data of telecom operators to mine out churn trends of a specific region or a specific person or and age group.
Questions:
1. Pick three analysis terms from slide 3 that are relevant to your project. Define them and explain why they are relevant: [Slides attached]
2. Describe the difference between calibration (fidelity) and discrimination (accuracy):
3. What are the differences between estimation and classification models?
4. Select two of the methods on slide 11 and explain how they are relevant to your problem. Select one method and explain how it would be a poor selection:
5. Describe a model validation method and at least one model quality metric
6. Which type of predictive analysis sounds most exciting to you? Why?
Structure Estimation Correlation Regression Predictive Analytics Dimensional Reduction Compression Clustering Pattern Recognition Discrimination Classification Machine Learning Supervised Unsupervised Artificial Intelligence These are all closely related. Slide -3Explanation / Answer
Region specific settings:
Keyboard Layout: This is set using the loadkeys command.The local X configuation tool can be used for this purpose.
XkbdLayout is the one that is used.
Example: XkbdLayout "us"
Fonts:The setfont tool is used for loading fonts in text mode.This usually comes with an innputrc file which enables the ability to combine characters.
Example: export INPUTRC="/etc/inputrc"
Date and time display: This is usually done during installation.And then it can be updated using the Network Time Protocol.
Example:
debby: ^ > ps -ef | gre ntpd
ntp 22458 1 0 2006? 00:00:24 ntpd -U ntp
The ntp update is run manually in order to set the time every time we aproach the time server.
root@box: ^ # ntpdate 12.2.4.100
15 Aug 15:35:43 ntpdate[20336]: adjust time server 12.2.4.100 offset
-0.004567 sec
NTP package can be checked in the given system manual.And the commands used for setting the correct time zone are tzconfig or timezone commands.
Language : gdm or kdm commands are used to configure language settings before logigng in.
Example:
debby: ^> acroread/ var/ tmp /54743s.pdf
Warning: charset "UTF-8" not supported,using "ISO77695-1".
Aborted.
debby: ^ > set | grep UTF
LANG=en_US.UTF-8
debby: ^ > export LANG=en_US
debby: ^?> acroread / var / tmp / 54743s.pdf