Hello Friends,

 

Recently I have attended the interview with a six sigma expert, he give me scenario and told me to  find the flaw in it.

 

Below is scenario :  

 

When Age is increase and petrol price is also increasing, the tool used is regression.

 

The result shows as strong positive correlation. R=1

 

What is the flaw?   

Interesting question.

The flaw is - correlation and regression should only be used for variables that have a known cause and effect relationship. In this case we should not have used these tools.

Hello Vishwadeep,

 

Thanks for your reply,

 

RIC - i request could you please answer for the another question, which i recently posted three weeks before,.

 

Thanks in advance.

 

Regards,

V. Ramanan