Chapter 2: Q. 2.73 (page 69)
Construct a dot plot for the given data.

Short Answer
The dot plot is:
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Chapter 2: Q. 2.73 (page 69)
Construct a dot plot for the given data.

The dot plot is:
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Explain the difference between
a. frequency and relative frequency.
b. percentage and relative frequency.
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.

For quantitative data, we examined three types of grouping: single-value grouping, limit grouping, and cut point grouping. For each type of data given, decide which of these three grouping types is usually best, Explain your answers.
a. Continuous data displayed to one or more decimal places
b. Discrete data in which there are relatively few distinct observations
Inauguration Ages. From the Information Please Almanac, we obtained the ages at the inauguration of the first 44 presidents of the United States (from George Washington to Barack H. Obama).

a. Identify the classes for grouping these data, using limit grouping with classes of equal width 5 and a first-class of 40-44.
b. Identify the class marks of the classes found in part (a).
c. Construct frequency and relative frequency distributions of the inauguration ages based on your classes obtained in part (a).
d. Draw a frequency histogram for the inauguration ages based on your grouping in part (a).
e. Classify the shape of the distribution of inauguration ages for the first 44 presidents of the United States both generally and specifically.
Gas Mileage. The gas mileages, are rounded to the nearest number of miles per gallon, of all new car models.
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