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review for test

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
The average age of students in a statistics class is 22. Does this statement describe descriptive or inferential statistics?   Descriptive  
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A survey of 1353 American households found that 18% of the households own a computer. Identify the population and sample.   population - collection of American households; sample - collection of 1353 American households surveyed.  
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The average salary of all General Motors workers is 33,000. Does this value describe a population parameter or a sample statistic? Explain.   Population parameter because the 33,000 is based on all the workers at GM.  
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Identify the level of measurement for data that can be classified according to color.   nominal  
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Identify the level of measurement for data that are the final grades (A, B, C, D, and F) for students in a stats class.   ordinal  
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Identify the level of measurement for data that are the temperature of 22 refrigerators.   interval  
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Classify the number of complaint letters received by the United States Postal Service in a given day as quantitative or qualitative data?   quantitative  
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Identify the level of measurement for data that are the number of pages in your stats book.   ratio  
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Every fifth teenager entering a concert is checked for possession of drugs. What sampling technique is used?   systematic  
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What method of data collection would you use to collect data for a study of the salaries of college professors at a particular college?   take a census  
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