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Chapter 2: Q2.3 (page 40)
Explain the meaning of
Qualitative Variable
Discrete, Quantitative Variable
Continuous, Quantitative Variable
Qualitative can't be measured in numbers, Discrete Quantitative can be measured only in whole numbers, Continuous Quantitative Variable can be measured in both whole & non whole numbers.
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For instance, consider the grouped days-to-maturity data given in Table (b) on page .
From that table, we see that the cumulative frequency of investments with a maturity period of less than day is and, therefore, the cumulative relative frequency is.
Table shows all cumulative information for the days-to-maturity data.
Cumulative information for days-to-maturity data.
a. Round each observation to the nearest year and then construct a stem-and-leaf diagram of the rounded data.
b. Truncate each observation by dropping the decimal part, and then construct a stem-and-leaf diagram of the truncated data.
c. Compare the stem-and-leaf diagrams that you obtained in parts (a) and (b).
University Patents. The number of patents a university receives is an indicator of the research level of the university. From a study titled Science and Engineering Indicators issued by the National Science Foundation, we found the number of U.S. patents awarded to a sample of private and public universities to be as follows.
Construct a stem-and-leaf diagram for these data with
a. one line per stem.
b. two lines per stem.
c. Which stem-and-leaf diagram do you find more useful? Why?
Explain the difference between
a. frequency and relative frequency.
b. percentage and relative frequency.
As mentioned, for relative-frequency polygons, we label the horizontal axis with class marks in limit grouping and class midpoints in cut point grouping. How do you think the horizontal axis is labeled in single-value grouping.
Top Broadcast Shows. As reported in Primetime Broadcast Programs, a publication of The Nielsen Company, the top three prime broadcast network television shows for the week of August 5, 2013, are as presented in the following table. Ratings are the percentage of TV homes in the United States tuned into television. Identify the type of data provided by the information in each column of the table
.
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