Chapter 8 Examples

Chapter 8 Examples - Measuring intelligence this way is A....

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Chapter 8 Notes Examples Page 1 of 2 Exercise Between 1977 and 1998, 432 convicted criminals were put to death in the US. Here are data on the number of executions in several states during those years, as well as the 1990 population of these states: State Population (thousands) Executions Rate Alabama 4,040 16 3.96 Arkansas 2,351 16 6.81 Florida 12,938 39 3.01 Missouri 5,117 29 5.67 Nevada 1,202 6 4.99 Texas 16,986 144 8.48 Virginia 6,189 46 7.43 Texas, Florida and Virginia are among the leaders in executions. Because these are large states, we might expect them to have many executions. Is Florida still high when you compare rates? A. Yes B. No Exercise It is hard to measure “intelligence.” Let’s do it the easy way: measure height in inches, and call the results “intelligence.” Not only is this method easy, it gives the same number every time we repeat the measurement on the same person.
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Unformatted text preview: Measuring intelligence this way is A. not reliable and not valid. B. highly reliable but not valid. C. valid, but not reliable. D. both valid and highly reliable. = 1000 ands in thous population executions million per rate Chapter 8 Notes Examples Page 2 of 2 Example A laboratory technician has been assigned to check two scales, Scale 1 and Scale 2. She was given an object with a known weight of 4 grams to perform the checks. Using Scale 1, the technician weighed the object 5 times and obtained the following measurements: 7 2 6 5 3 The measurements from Scale 1 are A. Placebos B. Unreliable C. Statistically significant D. Biased Using Scale 2, the technician weighed the object 5 times and obtained the following measurements: 7 7 7 7 7 The measurements from Scale 2 are A. Placebos B. Unreliable C. Statistically significant D. Biased...
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This note was uploaded on 02/14/2011 for the course STAT 110 taught by Professor Johnson during the Fall '07 term at South Carolina.

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Chapter 8 Examples - Measuring intelligence this way is A....

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