Question Details

1. A stem-and-leaf display is a graphical portrayal of a data set that shows the data set's overall pattern of variation. 
True    False

2. The relative frequency is the frequency of a class divided by the total number of measurements. 
True    False

3. A bar chart is a graphic that can be used to depict qualitative data. 
True    False

4. Stem-and-leaf displays and dot plots are useful for detecting outliers. 
True    False

5. A scatter plot can be used to identify outliers. 
True    False

6. When looking at the shape of the distribution using a stem-and-leaf, a distribution is skewed to the right when the left tail is shorter than the right tail. 
True    False

7. When we wish to summarize the proportion (or fraction) of items in a class we use the frequency distribution for each class. 
True    False

8. When establishing the classes for a frequency table it is generally agreed that the more classes you use the better your frequency table will be. 
True    False

9. The sample cumulative distribution function is non-decreasing. 
True    False

10. A frequency table includes row and column percentages. 
True    False

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