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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A quantitative data set has been grouped by using limit grouping with equal-width classes. The lower and upper limits of the first class are and , respectively, and the class width is .
a. What is the class mark of the second class?
b. What are the lower and upper limits of the third class?
c. Which class would contain an observation of ?
Explain the relative positioning of the bars in a histogram to the numbers that label the horizontal axis when each of the following quantities is used to label that axis.
a. Lower class limits
b. Lower class cut points
c. Class marks
d. Class midpoints
Detroit Tigers. From the Baseball Almanac website, we found the heights, in inches, of the players on the 2012 World Series runner-up Detroit Tigers baseball team.
Use the graph to answer the following questions. Note that cholesterol levels are always expressed as whole numbers.

a. Construct a stem-and-leaf diagram of these data with five lines per stem.
b. Why is it better to use five lines per stem here instead of one or two lines per stem?
Old Faithful. Old Faithful is a geyser in Yellowstone National Park that erupts at relatively predictable intervals. Since 2000, the eruptions of Old Faithfull occur on average every 90 minutes. Information on the daily eruptions of Old Faithful can be found on the website of The Geyser Observation and Study Association (GOSA). The following data provide the times between eruptions, in minutes, for Old Faithful over a two-day period.
96 | 68 | 99 | 97 | 92 | 61 | 105 | 89 |
95 | 71 | 93 | 104 | 85 | 107 | 91 | 97 |
99 | 86 | 102 | 93 | 99 | 64 | 102 | 86 |
101 | 81 | 117 | 87 | 106 | 93 | 106 | 106 |
a. Use cutpoint grouping with a first class of 60 -under 70 to construct a frequency histogram of the times between eruptions.
b. Identify the shape of the distribution with regard to modality.
c. Identify the shape of the distribution with regard to symmetry (or nonsymmetry).
d. If the distribution is unimodal and nonsymmetric, classify it as either right skewed or left skewed.
The Great White Shark. In an article titled "Great White, Deep Trouble" (National Geographic, Vol. 197(4). pp. 2-29). Peter Benchley - the author of JAWS - discussed various aspects of the Great White Shark (Carcharodon Carcharias). Data on the number of pups borne in a lifetime by each of 80 Great White Shark females are given on the WeissStats site.
a. use the technology of your choice to identify the modality and symmetry (or non-symmetry) of the distribution of the data set.
b. if unimodal, classify the distribution as symmetric right-skewed. or left-skewed.
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