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| 1 | |
A dot plot shows: |
| | A) | the general shape of a distribution. |
| | B) | the mean, median, and mode. |
| | C) | the relationship between two variables. |
| | D) | the interquartile range. |
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| 2 | |
The test scores for a class of 101 students are computed. What is the location of the test score associated with the third quartile? |
| | A) | 75% |
| | B) | 31 |
| | C) | 50.0 |
| | D) | 76.5 |
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| 3 | |
The test scores for a class of 50 students are computed. What is the location of the test score associated with the second decile? |
| | A) | 20% |
| | B) | 31 |
| | C) | 10.2 |
| | D) | 20.5 |
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| 4 | |
To summarize a data set with a box plot: |
| | A) | two values are required: the 1st quartile and the 3rd quartile. |
| | B) | three values are required: the minimum, median, and maximum. |
| | C) | four values are required: the minimum, 1st quartile, 3rd quartile, and maximum. |
| | D) | five values are required: the minimum, 1st quartile, median, 3rd quartile, and maximum. |
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| 5 | |
For a data set, the interquartile range is: |
| | A) | the difference between the minimum and maximum values. |
| | B) | the standard deviation. |
| | C) | the difference between the 1st and 3rd quartiles. |
| | D) | the skewness of a distribution. |
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| 6 | |
For any symmetric distribution: |
| | A) | The mean, median, and mode are equal. |
| | B) | Compared to the median and mode, the mean is the largest measure of location. |
| | C) | Compared to the mean and mode, the median is the largest measure of location. |
| | D) | Compared to the mean, median, and mode, the standard deviation is the largest value. |
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| 7 | |
For a data set, the coefficient of skewness is -2.73. We conclude that: |
| | A) | the mean is larger than the median. |
| | B) | the median is larger than the mean. |
| | C) | the standard deviation is a less than zero. |
| | D) | something is wrong because the coefficient of skewness cannot be less than -1.00. |
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| 8 | |
The purpose of a contingency table is to summarize: |
| | A) | two continuous, ratio variables. |
| | B) | two discrete, ratio variables. |
| | C) | two discrete, nominal or ordinal variables. |
| | D) | two discrete, continuous variables. |
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| 9 | |
A scatter diagram: |
| | A) | graphically portrays the relationship between two variables. |
| | B) | uses interval or ratio scale data. |
| | C) | does not allow negative values. |
| | D) | both A and B are correct. |
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| 10 | |
Contingency tables and scatter diagrams describe: |
| | A) | univariate data. |
| | B) | qualitative data. |
| | C) | bivariate data. |
| | D) | frequency data. |
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