Question 195596: Im having trouble determing if these are parametric or nonparametric
1. Once a month, the quality assurance department of a light bulb manufacturing company test-burns 50 light bulbs, operating them continuously until they all burn out, to make sure that, on average, the bulbs last as long as the marketing department claims they last.
2. A climatologist carefully compiles records of the number of named Atlantic Ocean and Gulf of Mexico hurricanes for each year of a thirty year period, as well as the mean global surface air temperature for each of the same years, in an effort to determine whether global warming has affected the number of hurricanes that occur each year.
3. In every U.S. general election year, the TV news shows vie with each other to "call" the election, trying to be the first to accurately predict which candidate will be elected as the next President.
4. An old TV commercial used to claim that 9 out of 10 dentists recommend a certain brand of toothpaste. Suppose you wanted to verify that claim. You randomly invite a panel of dentists to vote on the toothpaste that they recommend, and you examine the results to see whether the assertion is valid.
5. You are manager of manufacturing for a PC company. One of your factories has three independent production lines, all operating at full capacity to produce the same model of computer. Or are they? You begin to suspect that the night shift on line 2 is producing significantly fewer computers than the other two lines on that shift. To discover whether that's true, you pull the production records to see how many computers were produced on each night shift, for each production line, for the past two weeks.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1. Once a month, the quality assurance department of a light bulb manufacturing company test-burns 50 light bulbs, operating them continuously until they all burn out, to make sure that, on average, the bulbs last as long as the marketing department claims they last.
Ans: Parametric
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2. A climatologist carefully compiles records of the number of named Atlantic Ocean and Gulf of Mexico hurricanes for each year of a thirty year period, as well as the mean global surface air temperature for each of the same years, in an effort to determine whether global warming has affected the number of hurricanes that occur each year.
Ans: Parametric
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3. In every U.S. general election year, the TV news shows vie with each other to "call" the election, trying to be the first to accurately predict which candidate will be elected as the next President.
Ans: Non-Parametric
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4. An old TV commercial used to claim that 9 out of 10 dentists recommend a certain brand of toothpaste. Suppose you wanted to verify that claim. You randomly invite a panel of dentists to vote on the toothpaste that they recommend, and you examine the results to see whether the assertion is valid.
Ans: Not a statistical study
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5. You are manager of manufacturing for a PC company. One of your factories has three independent production lines, all operating at full capacity to produce the same model of computer. Or are they? You begin to suspect that the night shift on line 2 is producing significantly fewer computers than the other two lines on that shift. To discover whether that's true, you pull the production records to see how many computers were produced on each night shift, for each production line, for the past two weeks.
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Ans: Parametric
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Cheers,
Stan H.
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