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If records show that 294 of 300 ceramic insulators tested were able to withstand a certain thermal shock, what is the probability that any one untested insulator will be able to withstand the thermal shock?
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Among the insulators tested, $\frac{294}{300}=0.98$ were able to withstand the thermal shock, and we use this figure as an estimate of the probability.
by Diamond (38,951 points)

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