NPD is not accurate ( partly )

[Mr Khan]

Euphoria14 said:

Mr Khan said:

If you've worked in statistics, you tend to understand that as long as the sample size is large enough and you are being unbiased in which retailer you choose (which is where NPD kind of falls off. Don't they not track Walmart for video games?), you can have the sample reflect reality. With a large sample, you can state with a high degree of confidence that the "real" value is about X, plus or minus a margin of error.

NPD has been getting information from Walmart since 2012.

https://www.npd.com/wps/portal/npd/us/news/press-releases/pr_120203/

Ah. It's been a long time since i've been paying attention to the actual sales tracking side of things <_>