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Calculation of a percent figure’s “true value”
here you can test the statistical uncertainty of two percent figures from the same survey.
Likelihood of a percent figure being different compared to another (same sample)
here you can test how likely it is that two percent figures from the same survey are different
Likelihood of a percent figure being different compared to another (two samples)
here you can test whether two percent figures from two different samples for example two different
weeks or waves in a tracking are different.
Weekly Tracking Sample Size Calculation
here you can estimate how many interviews you need in a weekly tracking, if you know how much
difference from week to week you are looking for For example: if you expect your brand awareness
to be 50% during week 1 and you want to be able to measure an increase to say 60% in week 2, and you
want to measure this difference with 95% certainty, you will need at least 188 weekly interview. Here you can
test whether two percent figures from two different samples for example two different weeks or waves in a
tracking are different.