3 ms·

Thanks for the link and the correct terminology (I updated my post).

• fleitz 15y ago
  To expand it really depends on what the results of the testing are: If you split your 170 customers into two groups of 85, if 40 of 85 pick A and 5 of 85 pick B then it's extremely likely that A is the better choice. If 39 pick A and 40 pick B then you'd need a larger sample size to overcome the margin of error. Of course at a 95% confidence interval any result even in excess of the MOE is pure chance 1 of out 20 times. What I'd do is split your customer base into 3 groups of 50% 25% and 25%, test each 25% and then apply the winner to the 50%.
  • gs7 15y ago
    That's a great suggestion, thanks a lot!