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Chapter 2: Q. 5 (page 88)
Identify two main types of graphical displays that are used for qualitative data.
Bar charts and pie charts are the two most used types of graphical displays for qualitative data.
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Discuss the relative advantages and disadvantages of stem-and leaf diagrams versus frequency histograms.
Residential Energy Consumption. Refer to the energy consumption data given in Exercise 2.84.
a. Construct a table similar to table for the data, based on the classes specified in Exercise 2.84. Interpret your results.
b. Construct an ogive for the data.
This problem is about data.
a. What are data?
b. How is data type determined?
Cholesterol Levels. According to the National Health and Nutrition Examination Survey, published by the Centers for Disease Control and Prevention, the average cholesterol level for children between 4 and 19 years of age is 165mg /dl. A pediatrician who tested the cholesterol levels of several young patients was alarmed to find that many had levels higher than 200mg / dL. The following relative frequency histogram shows the readings for some patients who had high cholesterol levels.
We have drawn a smooth curve that represents a distribution,
a. Identify the shape of the distirbution with regard to modality.
b. Identify the shape of the distribution with regard to symmetry (or non symmetry)
c . If the distribution is unimodal and non symmetric, classify it as either right skewed or left skewed.
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