Question 1076550
the probability of failing the test is 1 -0.97 = 0.03
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Use Poisson probability distribution
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The probability that there are 
r occurrences in a given interval = lamda^r * e^-lamda / r!, where e = 2.7128 and lamda is the mean number of occurrences in a time period 
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use a Poisson distribution calculation
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P( X > or = 7 ) = 9.9E^-13
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