1 / 19

Intro Stats Lesson 2.1 B Objective: SSBAT construct an expanded frequency distribution chart.

Intro Stats Lesson 2.1 B Objective: SSBAT construct an expanded frequency distribution chart. Standards: S2.5B. Expanded Frequency Distribution Adds 3 more columns to the frequency distribution from yesterday - Midpoints, Relative Frequency, and Cumulative Frequency

aggie
Download Presentation

Intro Stats Lesson 2.1 B Objective: SSBAT construct an expanded frequency distribution chart.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Intro Stats Lesson 2.1 B Objective: SSBAT construct an expanded frequency distribution chart. Standards: S2.5B

  2. Expanded Frequency Distribution • Adds 3 more columns to the frequency distribution from yesterday - Midpoints, Relative Frequency, and Cumulative Frequency • These 3 columns will help to provide a better understanding of the data

  3. Midpoint of a Class • The Average of the lower and upper limit of each class • Midpoint of Class = • You will use this formula for each row of the frequency distribution

  4. Relative Frequency • The portion or percentage of the data that falls in that class • Divide the Frequency of that Class by the number of data entries • Relative Frequency =

  5. Cumulative Frequency • The sum of the Frequency for that class and all previous class frequencies

  6. Find the Midpoints, Relative Frequency and Cumulative Frequency for the following.

  7. Problem 1 continued. • Midpoints • = 4.5 • = 10.5 • = 16.5 • = 22.5 •  = 28.5

  8. Problem 1 continued.

  9. Problem 1 continued. Relative Frequency = .19 .31 .19 .19 .11

  10. Problem 1 continued. • Cumulative Frequency • The sum of the Frequency for that class and all previous classes 7 18 25 32 36

  11. 2. Find the Midpoints, Relative Frequency and Cumulative Frequency for the following. 12.5 24.5 36.5 48.5 60.5 72.5 84.5

  12. 2. Relative Frequency  Frequency ÷ Total # .12 .2 .26 .16 .1 .12 .04 12.5 24.5 36.5 48.5 60.5 72.5 84.5

  13. 2. Cumulative Frequency  Class Frequency + Above Frequencies 6 16 29 37 42 48 50 .12 .2 .26 .16 .1 .12 .04 12.5 24.5 36.5 48.5 60.5 72.5 84.5

  14.  Example Three is worksheet 2.1 B

  15. 4. Find the Midpoints, Relative Frequency and Cumulative Frequency for the following.

  16. 4. Answers to #3

  17. Homework Worksheet 2.1 B

More Related