Pottery An artist experimenting with clay to create pot-tery with a special texture has been experiencing dif-ficulty with these special pieces. About 40% break in the kiln during firing. Hoping to solve this problem, she buyssome more expensive clay from another supplier. Sheplans to make and fire 10 pieces and will decide to usethe new clay if at most one of them breaks.a) Suppose the new, expensive clay really is no betterthan her usual clay. What’s the probability that this testconvinces her to use it anyway? (Hint: Use a Binomialmodel.)b) If she decides to switch to the new clay and it is nobetter, what kind of error did she commit?c) If the new clay really can reduce breakage to only20%, what’s the probability that her test will not detectthe improvement?d) How can she improve the power of her test? Offer atleast two suggestions.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Pottery An artist experimenting with clay to create pot-
tery with a special texture has been experiencing dif-
ficulty with these special pieces. About 40% break in the
kiln during firing. Hoping to solve this problem, she buys
some more expensive clay from another supplier. She
plans to make and fire 10 pieces and will decide to use
the new clay if at most one of them breaks.
a) Suppose the new, expensive clay really is no better
than her usual clay. What’s the probability that this test
convinces her to use it anyway? (Hint: Use a Binomial
model.)
b) If she decides to switch to the new clay and it is no
better, what kind of error did she commit?
c) If the new clay really can reduce breakage to only
20%, what’s the probability that her test will not detect
the improvement?
d) How can she improve the power of her test? Offer at
least two suggestions.
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