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Scatter plots are used to visualize association in samples of paired data (X,Y).

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True

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? 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?

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blured image The dot plot suggests right-skewness.Hi...

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Dot plots are similar to histograms with many bins (classes).

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Which is a not a characteristic of pie charts?


A) Pie charts can only convey a general idea of the data values.
B) Pie charts are ineffective when they have too many slices.
C) Exploded and 3D pie charts will allow more "slices."
D) Pie chart data always represent parts of a whole (e.g. ,market share) .

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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? 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?

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blured image The dot plot suggests right-skewness.Hi...

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Which data would be suitable for a pie chart?


A) Percent vote in the last election by party (Democrat,Republican,Other)
B) Retail prices of six major brands of color laser printers
C) Labor cost per vehicle for 10 major world automakers
D) Prices paid by 10 students for their accounting textbooks

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Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour) of 49 randomly chosen vehicles on highway I-80 in Nebraska.How many vehicles were traveling exactly the speed limit (70 mph) ? Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour) of 49 randomly chosen vehicles on highway I-80 in Nebraska.How many vehicles were traveling exactly the speed limit (70 mph) ? A) 0 B) 1 C) 19 D) Impossible to tell


A) 0
B) 1
C) 19
D) Impossible to tell

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A pie chart can generally be used instead of a bar chart.

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A common error with pie charts is using too few "slices."

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A column chart can sometimes be used instead of a line chart for time series data.

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Log scales are common because most people are familiar with them.

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Which is not a poor graphing technique?


A) Gratuitous pictures
B) Labeled axis scales
C) 3D bar charts
D) Rotated axis

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Which is not a characteristic of using a log scale to display time series data?


A) A log scale helps if we are comparing changes in two time series of dissimilar magnitude.
B) General business audiences find it easier to interpret a log scale.
C) If you display data on a log scale,equal distances represent equal ratios.

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Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation. 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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Eye-catching and colorful,but title is vague,units are not given,too many pie slices,3D makes it hard to assess size of slices,no source,and no year.

A population has 75 observations.One class interval has a frequency of 15 observations.The relative frequency in this category is


A) 0.20
B) 0.10
C) 0.15
D) 0.75

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It is possible to construct a histogram or frequency polygon with open-ended classes.

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Effective summary tables generally


A) have very detailed column headings and footnotes.
B) round their data to three or four significant digits.
C) use plenty of heavy vertical lines to separate the columns.
D) have the raw data listed in a footnote for clarity.

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B

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. 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.

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Strong clustering ne...

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In a bimodal histogram,the two highest bars will have the same height.

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A dot plot would be useful in visualizing scores on an exam in a class of 30 students.

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