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# MATH 153 Chapter 2

### Summarizing Data - Charts & Graphs

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