Difference between revisions of "AP Statistics Curriculum 2007 EDA Freq"
| Line 2: | Line 2: | ||
===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. | |
| + | |||
<center>[[Image:AP_Statistics_Curriculum_2007_IntroVar_Dinov_061407_Fig1.png|500px]]</center> | <center>[[Image:AP_Statistics_Curriculum_2007_IntroVar_Dinov_061407_Fig1.png|500px]]</center> | ||
| − | === | + | ===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. | |
| − | + | {| class="wikitable" | |
| + | |- | ||
| + | ! 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=== | ===Computational Resources: Internet-based SOCR Tools=== | ||
Revision as of 14:15, 27 January 2008
Contents
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
- TBD
Examples
Computer simulations and real observed data.
- TBD
Hands-on activities
Step-by-step practice problems.
- TBD
References
- TBD
- SOCR Home page: http://www.socr.ucla.edu
Translate this page:
