ChatterBank1 min ago
NOT repeat NOT looking for music or singer - just a general rant
Saw an advert extolling the virtues of a Bosch dishwasher which claimed their machine used something like 6 litres of water per wash - I guess that is possible - whereas a 'normal' hand/sink wash uses 49 litres!!!
Are they sure? 49 litres? (That's over 10 & a half gallons in old money)
On a completely different advert Mr Johnny Ball - the guy who would have us believe taught us all maths - asks would you prefer £15 a month for a service agreement on an old boiler or £17 a month for a brand new one including servicing. OK you might say sounds reasonable? What he doesn't mention - or use in his calculations - and is in VERY SMALL PRINT is the £560 plus deposit!!
Finally a lot of these adverts - especially skincare/make-up adverts say that '79% agree it makes you look younger' - and how many of the millions of possible target audience have they asked? Generally between one and two hundred - which means 0.000000079% really.
Come on ad people - give us the true facts
Are they sure? 49 litres? (That's over 10 & a half gallons in old money)
On a completely different advert Mr Johnny Ball - the guy who would have us believe taught us all maths - asks would you prefer £15 a month for a service agreement on an old boiler or £17 a month for a brand new one including servicing. OK you might say sounds reasonable? What he doesn't mention - or use in his calculations - and is in VERY SMALL PRINT is the £560 plus deposit!!
Finally a lot of these adverts - especially skincare/make-up adverts say that '79% agree it makes you look younger' - and how many of the millions of possible target audience have they asked? Generally between one and two hundred - which means 0.000000079% really.
Come on ad people - give us the true facts
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if 79 of a sample of 100 said so that's a perfectly valid percentage to use - the issue is one of sample size. You don't need a sample of millions to get an accurate measure for the entire target audience; certainty levels will hit 95% at a sample size of around 800.
However, it is true that a sample of 100-200 is of questionable statistical validity and shouldn't be given house-room by any responsible researchers.
I'm surprised the MRS don't jump on it.
if 79 of a sample of 100 said so that's a perfectly valid percentage to use - the issue is one of sample size. You don't need a sample of millions to get an accurate measure for the entire target audience; certainty levels will hit 95% at a sample size of around 800.
However, it is true that a sample of 100-200 is of questionable statistical validity and shouldn't be given house-room by any responsible researchers.
I'm surprised the MRS don't jump on it.
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