Chapter 1: Problem 19
Briefly describe internal and external sources of data.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
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Chapter 1: Problem 19
Briefly describe internal and external sources of data.
These are the key concepts you need to understand to accurately answer the question.
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Explain the meaning of an element, a variable, an observation, and a data set.
The number of shoe pairs owned by six women is \(8,14,3,7,10\), and 5 , respectively. Let \(x\) denote the number of shoe pairs owned by a woman. Find: a. \(\Sigma x\) b. \((\Sigma x)^{2}\) c. \(\Sigma x^{2}\)
Explain the difference between cross-section and time-series data. Give an example of each of these two types of data.
Classify the following as cross-section or time-series data. a, Food bill of a family for each month of 2009 b. Number of armed robberies each year in Dallas from 1998 to 2009 c. Number of supermarkets in 40 cities on December 31, 2009 d. Gross sales of 200 ice cream parlors in July 2009
Briefly describe the two meanings of the word statistics.
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