STAT 2507 Final: final review practice
17 Jan 2015
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Stat 3502 exam review questions: when human beings assemble widgets, the proportion of defective widgets is known to be 0. 04. A robot assembled 500 widgets and 12 of them were defective. If so, at which significance levels is the evidence statistically significant: adam takes a random sample of 8 oranges and eve takes a random sample of 12 apples. Adam"s sample of oranges yields an average weight of 15 ounces with a standard deviation of 4 ounces. Eve"s sample of apples yields an average weight of 12 ounces with a standard deviation of 2 ounces. What is the probability that at least 4 of them fail within. 10,000 hours of use? (c) consider a random sample of 120 ipod nanos. Approximate the probability that at least 40 of them fail within 10,000 hours of use: the probability of a student passing stat 2606 is 0. 80.
