12. For the following description of data, identify the Ws, name the variables,

Question

12. For the following description of data, identify the Ws, name the variables, specify for each variable whether its use indicates it should be treated as categorical or quantitative, and for any quantitative variable identify the units in which it was measured (or note that they were not provided). Specify whether the data come from a designed survey or experiment. Are the variables time series or cross-sectional? Report any concerns you have as well. A food retailer that specializes in organic food has decided to open a new store. To help determine the best location in Texas, researchers decide to examine data about competing stores in Texas, including average weekly sales town area (square miles), mean age of town, mean income of town and whether or not the store sells liquor. Who was measured? O A. Competing stores in Texas O B. All stores in Texas O C. All organic food stores O D. This information is not given What was measured? Select all that apply. A. Mean age of town B. Mean income of town C. Average weekly sales D. Type of food F. Town area D E. City H. This information is not given. G. Whether or not the store sells liquor When were the measurements taken? O A. Recently O B. After the new store is built O C. Last year O D. This information is not given

Explanation / Answer

Solution

To facilitate the linking of questions to the information given, the second paragraph of the question is reproduced below with indexing for easy cross-reference.

a) to help determine the best location,

b) researchers decide to examine data about

c) competing stores in Texas

d) average weekly sales ($)

e) town area (square miles)

f) mean age of town

g) mean income of town ($)

h) whether or not the store sells liquor.

Answers (supporting part of the above information is indicated within brackets)

1. who? Option A (c)

2. what? Options A (f), B(g), C(d), F(e) and G(h)

3. when? This information is not given. So, Option D

4. where? Option A (implied by c)

5. why? Option C (a)

6.how ? Option A (implied by b)

7. categorical variables: Option C (h) – A, B, D and G are quantitative, E and F are not covered

8. quantitative variables: Options: A(f), C(e), F(d), G(g) – B and D not covered, E categorical

9. option (B)(implied by a)

10. The data is neither time series nor cross-sectional. So, option (c)

11. As such there are no specific concerns. So, option (D)

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