A Step-by-Step Introduction to Statistics for Business
Second Edition
Chapter 2: Working with Numbers and Data Display
Answers for all ‘Test Yourself’ questions from the book to check your performance and widen your overall understanding of the contents.
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- 5/4, 1.25, 125%
- 1/5, .2, 20%
- 1/20, .05, 5%
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- 4
- 10
- 3/10 = .3
- 9/10 = .9
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- A pie chart, because the data is qualitative (name of salesperson), and the manager wants to see them as a proportion of total sales.
- A histogram, because psychological survey data is interval, which is quantitative.
- A scatterplot, because we are comparing two variables.
- A bar chart and frequency table, because the data is qualitative, and we are comparing different groups.
- A frequency polygon, because the data is quantitative, and he’ll be able to compare the polygon for Year 1 to the polygon from Year 2.