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Magazine Problem 23
What type of variable is required when drawing a time-series plot? Why do we draw time-series plots?
Problem 26
The following data represent the land area and highest elevation for each of the seven continents. (a) Would it make sense to draw a pie chart for land area? Why? If so, draw a pie chart. (b) Would it make sense to draw a pie chart for the highest elevation? Why? If so, draw a pie chart.
Problem 31
Suppose you need to summarize ordinal data in a bar graph. How would you arrange the categories of data on the horizontal axis? Is it possible to make the order of the data apparent in a pie chart?
Problem 32
Describe the circumstances in which a bar graph is preferable to a pie chart. When is a pie chart preferred over a bar graph? Are there circumstances in which a pie chart cannot be drawn, but a bar graph could be drawn? What are these circumstances?
Problem 49
Why shouldn't classes overlap when summarizing continuous data in a frequency or relative frequency distribution?
Problem 51
Is there such a thing as the correct choice for a class width? Is there such a thing as a poor choice for a class width? Explain your reasoning.
