DonFerrari on 30 November 2015
jonhalo said:
DonFerrari said:
don't seem like that... the post was puting the fineprints of these year
How having 2000 of 250000 pooled being relevant something to prove the sample size is quite decent? If they are pooling for gaming, the other 248000 receipts are completely useless.
And 50% of people interested in politics is quite different from 0,2% of the receipts being relevant.. and 2000 receipts for game related, involving, cards, sw, peripheral and HW... how much of that is HW? How can you safely say they are reliable if perhaps their survey only have 200-500 HW surveyed and without better information about their demographic choice?
People already show how far they were on their statistical for last year... they said 63/37 and was 55/45 or something like that... that is 8 percentual points error, that is a very big margin of error.
|
they said 63/37 for black friday
55/45 was the whole npd month
i never said they are as exact as election polls. just better than amazon rankings or annecdotal shop insinder knowledge, because of the different demographics. these guys have at least a chance! to be a decent sample size of the overall market. and if you know theire margin of error, you can use the data to make some educated guesses. no1 should take the datapoints as closee to 100% or even 95% accurate of the overall console retail market tracked by the npd group
|
So the person quoting them made a mistake, because he said 55/45 for BF. Well whatever. Their margin was quite big, and either way they haven't vouched who was first overall just one SKU being more popular.
