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MATH 153 Chapter 2
Summarizing Data - Charts & Graphs
| Question | Answer |
|---|---|
| What is the purpose of a Bar Chart | To show comparisons |
| How do we find relative frequency? | Relative frequency=frequency/sum of all frequencies |
| What is the name of a graph in which rectangular bars are made to show frequency or relative frequency and the sides of the bars touch? | A histogram |
| In a stem and leaf plot, which numbers are the stems? a) the furthermost left b) the furthermost right | a) the furthermost left |
| Name the two symmetrical distribution shapes. | Uniform and bell-shaped |
| A Pareto chart displays frequency or relative frequency data in which order? a) ascending b) descending | b) descending |
| Calculate the relative frequencies for the following favorite morning beverages: Coffee-36, Tea-22, Orange juice-16, Milk-5, Other-12. Round to two decimal points. | Coffee-0.40, Tea-0.24, Orange juice-0.18, Milk-0.05, Other-0.13 |
| Define Frequency Distribution. | A frequency distribution lists each category of data and the number of occurrences for each category of data. |
| Name four ways to identify the shape of a distribution. | Uniform distribution, bell-shaped distribution, skewed right, and skewed left. |
| In a relative frequency distribution, what do the relative frequencies add up to? a) one b) four c) two | One |
| The ____________________ is the difference between consecutive lower class limits. | class width |
| True or false: Stem-and-leaf plots are easier to make and can contain more information than histograms. However, they are not very useful for large data sets. | True |