![Page 1: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/1.jpg)
CO_02.jpg
![Page 2: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/2.jpg)
2.2 Graphs and Tables for Quantitative DataObjectives:By the end of this section, I will beable to…
1) Construct and interpret a frequency distribution and a relative frequency distribution for quantitative data.
2) Use histograms and frequency polygons to summarize quantitative data.
![Page 3: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/3.jpg)
Section 2.2
Graphs and Tables for QUANTITATIVE Data
![Page 4: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/4.jpg)
We need DATA• What are the ages of your
siblings?
![Page 5: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/5.jpg)
SORT DATA
• First thing we want to do is plug the data into our calculators (STAT – EDIT – LIST1)
• Then Sort your data (STAT – SORTA() – 2nd 1 – ENTER)
![Page 6: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/6.jpg)
Frequency Distribution
• Is a table that organizes data.
Class # Interval Class Midpoint
Freq. Relative Freq
![Page 7: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/7.jpg)
Frequency Distribution
Step 1: Determine how many classes
Step 2: Determine the CLASS WIDTH
1) find the RANGE of data
2) Divide RANGE by # of classes
3) Round the answer
Step 3: Determine the upper and lower class limits
![Page 8: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/8.jpg)
Frequency Distribution
• Fill out the Table
Class # Interval Class Midpoint
Freq. Relative Freq
![Page 9: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/9.jpg)
Histogram• uses INTERVALS• Has TOUCHING BARS• Its NOT a bar graph
![Page 10: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/10.jpg)
Histogram• Create a histogram by hand • Label all your axes• Make the bars touching!• x axis = ages of siblings• y axis = frequency
![Page 11: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/11.jpg)
![Page 12: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/12.jpg)
On the calculator
• Now let’s graph a histogram on the calculator
![Page 13: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/13.jpg)
![Page 14: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/14.jpg)
![Page 15: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/15.jpg)
![Page 16: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/16.jpg)
Distribution Shape
We need to analyze the shape of the graphs.
There are two types of shapes.• Symmetric• Skewed
![Page 17: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/17.jpg)
Distribution Shape• Symmetric: if there is a line that splits the graph in
half so that one side is a mirror image of the other• The Bell Shaped Curve is a great example of a
symmetric graph.
![Page 18: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/18.jpg)
Distribution Shape
• Skewness: when a graph has a longer tail on one side– Left skewed vs. right skewed
![Page 19: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/19.jpg)
Frequency Polygon• Uses dots to plot the CLASS MIDPOINTS• It is NOT a line graph • Can be found in the financial section of
newspapers/internet
![Page 20: CO_02.jpg. 2.2 Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Construct and interpret a frequency](https://reader036.vdocument.in/reader036/viewer/2022062519/5697c0251a28abf838cd50cb/html5/thumbnails/20.jpg)
Frequency Polygon• Create a frequency polygon by hand• Label all your axes• Connect your dots!• x axis = ages of siblings• y axis = frequency