Introduction To Statistics

90 . Brieﬂy list strengths and weaknesses of this display. Cite speciﬁc principles of good graphs, as well as oﬀering your own general interpretation. 91 . Brieﬂy list strengths and weaknesses of this display. Cite speciﬁc principles of good graphs, as well as oﬀering your own general interpretation. 92 . Brieﬂy list strengths and weaknesses of this display. Cite speciﬁc principles of good graphs, as well as oﬀering your own general interpretation. 93 . Brieﬂy list strengths and weaknesses of this display. Cite speciﬁc principles of good graphs, as well as oﬀering your own general interpretation. 94 . A study found the following parts per billion of nitrosamines in a sample of domestic beers. (a) Construct a frequency distribution of four classes with equal class sizes. (b) Construct another frequency distribution of four classes using unequal class intervals or an open- ended interval for the highest class. (c) Which frequency distribution is preferable? Why? 95 . Students were given a take-home statistics assignment and were asked to write down how long it took them (in minutes). Their answers are shown below. (a) Make a dot plot. (b) Use your judgment to construct a frequency distribution using whatever classes (bins) you wish. (c) Make a histogram. (d) Describe the distribution. (e) Did your bin choices agree with Sturges' Rule? If not, why not? 96 . Students were asked to record how many hours they worked at an outside job last week. Their answers are shown below. (a) Make a dot plot. (b) Use your judgment to construct a frequency distribution using whatever classes (bins) you wish. (c) Make a histogram. (d) Describe the distribution. (e) Did your bin choices agree with Sturges' Rule? If not, why not? 97 . Ten part-time servers at a high-end restaurant were asked how many hours they worked last week, and how much they earned. The results are shown below. (a) Make a scatter plot. (b) Describe it. (c) What is your best guess of the average hourly pay? 98 . Craig operates a part-time snow-plowing business using a 2002 GMC 2500 HD extended cab short box truck. Describe Craig's gasoline mileage based on this histogram of 195 tanks of gas. 99 . Here are advertised prices of 23 used Chevy Impalas. Describe the distribution's shape. Is the number of histogram classes correct? 100 . Brieﬂy list strengths and weaknesses of this display. Cite speciﬁc principles of good graphs, as well as oﬀering your own general interpretation.

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