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

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Posts: 3
Registered: 12/12/04
How big should be the field trial?
Posted: Jul 12, 1996 6:01 PM
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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:
· Each technology has a set of equipments placed in a home.
· 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)
· We expected to have 0 to 20% of small fails and 0 to 10% of strong fails
in average.
· 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 house’s (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.

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