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Topic:
How big should be the field trial?
Replies:
1
Last Post:
Jul 14, 1996 11:17 PM



AA
Posts:
3
Registered:
12/12/04


How big should be the field trial?
Posted:
Jul 12, 1996 6:01 PM


We are going to build a field trial where we are going to place three technologies. We pretend to compare their performances for choosing one. In this case: Â· Each technology has a set of equipments placed in a home. Â· In this experience we have three technologies in the field (for example 10 of A technology, 10 of B technology and 10 of C technology) Â· We expected to have 0 to 20% of small fails and 0 to 10% of strong fails in average. Â· We are going to choose the technology that have less fails. How big the field trial should be? 20 of A, 20 of B and 20 of C technology houseÂs (60 houses) equipment are enough if the worse technology has 12%, the second have 7% and the thirth have 3% of fails considering a good level of significance? What level of significance we have?
If someone have the answer or if you need more details, tell me, please.
Thank you very much. Armando



