# Lab022425 - 12 What is the probability that at least 2 but...

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In a box of floppy discs, it is known that 80% will work. A sample of 10 of the discs is selected at random. 1. What is (i) sample space and (i) n? 2. What is   and (1- ) ? π π 3. Can you explain the shape of Histogram on the basis of the given information?  4. Give the expected value and standard deviation of the number of discs that work.  5. What is the difference between BINOMDIST(x, n,  , 0) and BINOMDIST(x, n,  , 1)? π π      Without calculation, what is BINOMDIST(n, n,  , 1)? π 6. What is the probability that 3 of the sample will work? 8. What is the probability that more than 7 of the sample will work? 9. What is the probability that less than 7 of the sample will work? 10. What is the probability that no less than 7 or at least 7 of the sample will work? 11. What is the probability that no more than 7 or at most 7 of the sample will work?

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Unformatted text preview: 12. What is the probability that at least 2 but less than 6 of the sample will work? 13. Graph the probability distribution described in this problem and check the shape. 7. What is the probability that 3 of the sample will not work? An oil exploration firm plans to drill 6 holes. They believe that the probability that each hole will yield oil is 0.10. Since they will be drilling in different locations, the outcomes are statistically independent. 1. What is (i) sample space and (ii) n? 2. What is and (1- ) ? π π 3. Give the expected value and standard deviation of the number of holes that will yield oil. 4. Can you explain the shape of Histogram on the basis of the given information? 5. Graph the probability distribution described in this problem and check the shape....
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