# AP Statistics Curriculum 2007 EDA Freq

(Difference between revisions)
 Revision as of 19:18, 27 January 2008 (view source)IvoDinov (Talk | contribs)← Older edit Revision as of 19:37, 27 January 2008 (view source)IvoDinov (Talk | contribs) (→Computational Resources: Internet-based SOCR Tools)Newer edit → Line 44: Line 44: ===Computational Resources: Internet-based SOCR Tools=== ===Computational Resources: Internet-based SOCR Tools=== * [http://socr.ucla.edu/htmls/SOCR_Charts.html SOCR Charts] allows you to generate graphical representations (including frequency histograms) of a variety of datasets. * [http://socr.ucla.edu/htmls/SOCR_Charts.html SOCR Charts] allows you to generate graphical representations (including frequency histograms) of a variety of datasets. + * The [[SOCR_EduMaterials_ChartsActivities | SOCR Charts activities]] provide usage-instructions, examples and demonstrations of how to use SOCR Charts. ===Hands-on activities=== ===Hands-on activities===

## General Advance-Placement (AP) Statistics Curriculum - Summarizing data with Frequency Tables

### Summarizing data with Frequency Tables & Histograms

There are two ways to describe a data set (sample from a population) - Pictorial Graphs or Tables of Numbers. Both are important for analyzing data.

### Definitions

• A frequency distribution is a display of the number (frequency) of occurrences of each value in a data set.
• A relative frequency distribution is a display of the percent (ratio or frequency to sample-size) of occurrences of each value in a data set.

### Example

Stage of disease at diagnosis of breast cancer in a random sample of US women.

Stage Frequency Relative Frequency
0 197 0.09
I 691 0.33
II 703 0.34
III 314 0.15
IV 187 0.09
Total 2092 1.00

### Computational Resources: Internet-based SOCR Tools

• SOCR Charts allows you to generate graphical representations (including frequency histograms) of a variety of datasets.
• The SOCR Charts activities provide usage-instructions, examples and demonstrations of how to use SOCR Charts.

### Hands-on activities

You can copy the first 2 columns in the data table above ans paste it in the SOCR Charts (BarChart --> XYPlot --> HistogramDemo7). You can see this SOCR Charts activity for help with histogram plots.