Test2 Practice Test _2

# Test2 Practice Test _2 - Test 1 Practice Test#2 The...

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Test 1 Practice Test #2 The Richmond Times-Dispatch provided an article on January 7, 2008 entitled “Virginia's prison population forecast to rise: To house estimated 6,700 more inmates by 2013, state builds, expands sites”. The last page of this test contains the list of all 44 prisons in the state of Virginia and some information about each of those prisons. 1. (10 points) Assume the data on the last page gives information for the entire population of interest. Describe completely the content of this population of interest. Hint: data is given for each member of the population. A one sentence answer that begins with “The population of interest consists of …” is sufficient. _____ 2. What type of characteristic is “ capacity of each prison (number of inmates) ”? (A) Constant (B) Categorical variable (C) Discrete quantitative variable (D) Continuous quantitative variable _____ 3. What type of characteristic is “ name of the prison ”? (A) Constant (B) Categorical variable (C) Discrete quantitative variable (D) Continuous quantitative variable _____ 4. What type of characteristic is “ state in which each prison is located ”? (A) Constant (B) Categorical variable (C) Discrete quantitative variable (D) Continuous quantitative variable _____ 5. What type of characteristic is “ percentage of inmates in each prison age 25 or less ”? (A) Constant (B) Categorical variable (C) Discrete quantitative variable (D) Continuous quantitative variable Of interest is to select a sample of 14 prisons in the Commonwealth of Virginia for further study. In selecting the sample, care should be taken to make sure a representative number of new/planned/expanded prisons (the six in bold on the data sheet) and a representative number of existing prisons (the other 38) are selected. To be clear, the six new/planned/expanded prisons are prisons numbered 9, 12, 17, 18, 32 and 38. 6. (10 points) To select a simple random sample of 14 of the 44 prisons the following would be done. Each prison would be associated with a unique two-digit number between 01 and 44. Then a line number in the table of random digits would be selected, and the first 14 non-repeating two-digit numbers between 01 and 44 would be selected. These numbers would correspond to the 14 prisons making up the sample. Explain in a couple of sentences why this simple random sampling procedure does not guarantee that a representative number of prisons be selected from each of the two groups described above. _____ 7.

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Test2 Practice Test _2 - Test 1 Practice Test#2 The...

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