Dear allstat,
I am trying to test for evidence of a statistically significant difference
between two indexed numbers.
It is further complicated by the fact that the nominator of the index is
also a function of the denominator.
More exactly, the index is awareness of a product divided by the average
awareness of all similar products. Is it possible to test for a
statistically significant change in this value, if it were measured
repeatedly across time? If so, how?
Many thanks in advance,
Karsten
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