Npd vs VGC tracking

[Teeqoz]

generic-user-1 said:

Teeqoz said:
Wat? The sample size is TOO big? How? What? The bigger the sample size, the more accurate the data.


Stop arguing against NPD, you're only making a fool out of yourself...

a big sample size needs a lot more math to get to beeing close to represantive.

you need a random sample, thats realy hard to get if you track a big none random part.

You don't need a random sample when you have a formula that isn't based on general coverage but instead is based on specific known trends, EG Toys'R Us will sell ~this much more kid friendly games than Gamestop etc.

 

Besides, NPD covers beetween 90-95% of retail video game marketshare, so it's not much they have to extrapolate.