# AP Statistics Curriculum 2007 EDA Freq

(Difference between revisions)
 Revision as of 19:09, 27 January 2008 (view source)IvoDinov (Talk | contribs)← Older edit Revision as of 19:20, 27 January 2008 (view source)IvoDinov (Talk | contribs) Newer edit → Line 3: Line 3: ===Summarizing data with Frequency Tables & Histograms=== ===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. 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. - -
[[Image:AP_Statistics_Curriculum_2007_IntroVar_Dinov_061407_Fig1.png|500px]]
===Definitions=== ===Definitions=== Line 45: Line 43: ===Computational Resources: Internet-based SOCR Tools=== ===Computational Resources: Internet-based SOCR Tools=== - * TBD + * [http://socr.ucla.edu/htmls/SOCR_Charts.html SOCR Charts] allows you to generate graphical representations (including frequency histograms) of a variety of datasets. - + - ===Examples=== + - Computer simulations and real observed data. + - * TBD - ===Hands-on activities=== ===Hands-on activities=== - Step-by-step practice problems. + You can copy the first 2 columns in the data table above ans paste it in the [http://socr.ucla.edu/htmls/SOCR_Charts.html SOCR Charts] (BarChart --> XYPlot --> HistogramDemo7). You can see [[SOCR_EduMaterials_Activities_Histogram_Graphs | this SOCR Charts activity]] for help with histogram plots. - * TBD +
[[Image:SOCR_EBook_Dinov_EDA_012708_Fig1.jpg|500px]]

===References=== ===References=== - * TBD + * [http://www.stat.ucla.edu/%7Edinov/courses_students.dir/07/Fall/STAT13.1.dir/STAT13_notes.dir/lecture02.pdf Lecture notes on EDA]

## 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.

### 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.