It's an interesting result... strictly speaking, the statistical power associated with the comparison of the two proportions (first sample of size 1,000 with Anwig Salade, the other of size 400 with Walahra Turban) is just ok (under .70 for a one-sided test), assuming the difference in hit rate is really around 12.5% and there are no other unaccounted sources of variability.
Nothing really pops out as a possible confounding factor, though.
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