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23 Cards in this Set
 Front
 Back
1. A dot plot is an easy way to represent the relationship between two variables.

FALSE


2. A dot plot is useful for quickly graphing frequencies in a small data set.

TRUE


3. A dot plot shows the relative symmetry of a distribution.

TRUE


4. A dot plot is useful for showing possible outliers.

TRUE


5. A dot plot is useful for showing the range of the data.

TRUE


6. A stemandleaf diagram shows the actual data values.

TRUE


7. In a stemandleaf display, the leaf represents a class of a frequency distribution.

FALSE


8. In a stemandleaf display, the leaf represents the members of a class in a frequency distribution.

TRUE


9. Quartiles divide a distribution into four equal parts.

TRUE


10. Quartiles divide a distribution into ten equal parts.

FALSE


11. Percentiles divide a distribution into one hundred equal parts.

TRUE


12. A student scored in the 85th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

FALSE


13. The 50th percentile of a distribution is the same as the distribution mean.

FALSE


14. A box plot graphically shows the 10th and 90th percentiles.

FALSE


15. The "box" in a box plot shows the interquartile range.

TRUE


16. A box plot shows the relative symmetry of a distribution.

TRUE


17. The coefficient of skewness is the standard deviation divided by the mean.

FALSE


18. Pearson's coefficient of skewness is a measure of a distribution's symmetry.

TRUE


19. If a distribution is negatively skewed, the distribution is not symmetrical and the long tail is to the left.

TRUE


20. A scatter diagram of sales versus production is labeled with sales on the Yaxis and production on the Xaxis.

TRUE


21. A scatter diagram of sales versus production may be constructed by plotting the minimum, first quartile, median, third quartile, and the maximum values of each variable.

FALSE


22. A relationship between gender and preference for Coke or Pepsi can be best represented by a scatter diagram.

FALSE


23. A relationship between two nominal variables is summarized by a contingency table.

TRUE
