We get a group of 18 batteries and find that their average lifetime is 107 hours with a standard deviation of 17 hours. What is the probability that we would get a gro
a) We get a group of 18 batteries and find that their average lifetime is 107 hours with a standard deviation of 17 hours. What is the
b) We get a group of 18 batteries and find that their average lifetime is 95 hours with a standard deviation of 17 hours. What is the probability that we would get a group of 18 batteries with an average lifetime of 95 hours or less if the average lifetime of all batteries is 97 hours?
C) We get a group of 18 batteries and find that their average lifetime is 107 hours with a standard deviation of 17 hours. Based on this data, we can say with 95% confidence that the average lifetime of all batteries is between
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