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Table shows the ages of the 25 wealthiest people in the world in 2010. Construct and interpret a stem-and-leaf diagram.
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A social scientist wants to analyze the relationship between educational attainment and income. He collects the data shown in Table, where Education and Income refer to an individual’s years of higher education and annual income (in $1,000s), respectively. Construct and interpret a scatterplot.
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Statistics
Explain Using Excel to Construct a Scatterplot?
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There are six broad sectors that comprise the Dow Jones Industrial Average (DJIA). The following table shows a portion of the 30 companies that comprise the DJIA and each company’s sector?
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When reviewing the overall strength of a particular firm, financial analysts typically examine the net profit margin. This statistic is generally calculated as the ratio of a firm’s net profit after taxes (net income) to its revenue, expressed as a percentage. For example, a 20% net profit margin means that a firm has a net income of $0.20 for each dollar of sales. A net profit margin can even be negative if the firm has a negative net income. In general, the higher the net profit margin, the more effective the firm is at converting revenue into actual profit. The net profit margin serves as a good way of comparing firms in the same industry, since such firms generally are subject to the same business conditions. However, financial analysts also use the net profit margin to compare firms in different industries in order to gauge which firms are relatively more profitable. The accompanying table shows a portion of net profit margins (in %) for a sample of clothing retailers.
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When reviewing the overall strength of a particular firm, financial analysts typically examine the net profit margin. This statistic is generally calculated as the ratio of a firm’s net profit after taxes (net income) to its revenue, expressed as a percentage. For example, a 20% net profit margin means that a firm has a net income of $0.20 for each dollar of sales. A net profit margin can even be negative if the firm has a negative net income. In general, the higher the net profit margin, the more effective the firm is at converting revenue into actual profit. The net profit margin serves as a good way of comparing firms in the same industry, since such firms generally are subject to the same business conditions. However, financial analysts also use the net profit margin to compare firms in different industries in order to gauge which firms are relatively more profitable. The accompanying table shows a portion of net profit margins (in %) for a sample of clothing retailers.
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The following table lists a portion of U.S. life expectancy (in years) for the 50 states.
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In the last two questions from the introductory case’s survey (Q3 and Q4), the 20 tweens were asked: “What time should the main dining area close?” and “How much of your own money did you spend at the lodge today?” Their responses appear in Table 1.1 in the introductory case. How are the time data classified? In what ways do the time data differ from ordinal data? What is a potential weakness of this measurement scale? What is the measurement scale of the money data? Why is it considered the strongest form of data? In what ways is the information from Q3 and Q4 useful for the resort?
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Statistics
