# AP Statistics Curriculum 2007 EDA Freq

(Difference between revisions)
 Revision as of 18:32, 14 June 2007 (view source)IvoDinov (Talk | contribs)← Older edit Revision as of 19:07, 27 January 2008 (view source)IvoDinov (Talk | contribs) Newer edit → Line 2: Line 2: ===Summarizing data with Frequency Tables & Histograms=== ===Summarizing data with Frequency Tables & Histograms=== - Example on how to attach images to Wiki documents in included below (this needs to be replaced by an appropriate figure for this section)! + 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]]
+ - ===Approach=== +
[[Image:AP_Statistics_Curriculum_2007_IntroVar_Dinov_061407_Fig1.png|500px]]
- Models & strategies for solving the problem, data understanding & inference. + - * TBD + ===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. - ===Model Validation=== + ===Example=== - Checking/affirming underlying assumptions. + Stage of disease at diagnosis of breast cancer in a random sample of US women. - * TBD + {| 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===

## 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

• TBD

### Examples

Computer simulations and real observed data.

• TBD

### Hands-on activities

Step-by-step practice problems.

• TBD

• TBD