Quiz1 - Quiz#1 Solutions 1 Classify the variable in the...

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Quiz #1 Solutions 1. Classify the variable in the following example as qualitative or quantitative. If the variable is quantitative, state whether it is discrete or continuous. “Species of trees sold at a nursery”. Answer: This statement is qualitative data because there are no numbers tied to the statement. 2. Determine whether the following study depicts an observational study or a designed experiment. A sample of 1,000 registered voters is asked, “Do you approve or disapprove of the President’s overa ll job performance?” Answer: This is observational data since the statement does not mention any variables that could be controlled.
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Unformatted text preview: that could be controlled. 3. How many whites were living in poverty in 2003? Answer: 22,196 4. Of the impoverished, what percent were Hispanic? Answer: Given the following Data: 282, 270, 260, 266, 257, 260, 267 5. The Mean is: 6. The Median is: 257, 260, 260, 266 , 267, 270, 282 7. The Mode is: 257, 260, 260 , 266, 267, 270, 282 8. The Rang is: 282 - 257 = 25 9. If the mean, , and , then the probability that a score, X, is between 404 and 632 is: Therefore the probability is about .68, so there are about 68% score in this range. 10. = Therefore the probability is about .025, so there are about 2.5% above 746....
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  • Spring '10
  • Dr.Silas
  • Statistics, 2.5%, Statistical data types, 68%, overall job performance

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