9F Oct 28th Revision

Categorical Data Values or observations that can be sorted into groups or categories. Examples: Eye colour, Favourite colour, favourite sport. Bar charts and Pie graphs are used to graph categorical data.

Numerical Data Values or observations that can be measured numerically. And these numbers can be placed in ascending or descending order. Examples: Height, Arm Span and Weight. Scatter plots and line graphs are used to graph numerical data.

Types of Graph and choosing the correct one From Continuum Videos review: Tt5gc Tt5gc From Edmodo Folders review & make notes: /index.html /index.html

Questions: Which type of graph would best show the number of rooms in each building in our school (multi choice question)? Line Graph Picture Graph Circle (pie) Graph Bar Graph Which type of graph would best show the number of rooms in each building in our school (multi choice question)? Line Graph Picture Graph Circle (pie) Graph Bar Graph Which type of graph would you use to show average temperatures in Melbourne over 7 days? Picture graph Double Bar Graph Line Graph Bar Graph Which type of graph would you use to show average temperatures in Melbourne over 7 days? Picture graph Double Bar Graph Line Graph Bar Graph

Which is the best type of graph to show the number of students who prefer pens and the number of students who prefer pencils in each grade? stem-and-leaf plot bar graph circle graph double bar graph Which is the best type of graph to show the number of students who prefer pens and the number of students who prefer pencils in each grade? stem-and-leaf plot bar graph circle graph double bar graph Which is the best type of graph to show the average rainfall in a city every year for ten years? stem-and-leaf plot line graph double bar graph Which is the best type of graph to show the average rainfall in a city every year for ten years? stem-and-leaf plot line graph double bar graph More Questions

Double Bar Graphs 1.How many more Grade 4 students preferred Basketball to Grade 3 students? 2.How many Grade 3 students were surveyed? 3.How many Grade 4 students were surveyed? 4.How many more Grade 3 students preferred Baseball compared to those who preferred swimming?

Mean, Median, Mode and Range Calculate Mean, Median, Mode and Range for each of the following data sets: A.35, 56, 34, 44, 52, 12, 34, 45 B.24, 34, 32, 16, 45, 38, 28 C.86, 24, 65, 65, 24, 24

9F Oct 28th Workshop

Primary and Secondary Data xcg xcg Primary Data is data you collect yourself, for example by survey, observation or interviews. Secondary Data is data that is collected by other people and already exists, for example data from the Internet such as Australian Bureau of Statistics website.

Stem and Leaf Plots A Stem and Leaf Plot is a special table where each data value is split into a "leaf" (usually the last digit) and a "stem" (the other digits). Like in this example: "32" is split into "3" (stem) and "2" (leaf).

Q1. What is the total number of people younger than 30 years old who attended the speech? Choose the best answer and write in the blank below. a. 2 b. 81 c.14 d.60 Q2. Which interval of age group contains least number of people? Q3. How many people had ages from 25 to 40? Q4. Which stems contain at least 7 people?

Questions What is the range for the above stem and leaf plot? For the above stem and leaf plot, what is the median value?

What is the range for the above stem and leaf plot? What is the mode for the above stem and leaf plot?

What is the median for the above stem and leaf plot?

For the above stem and leaf plots, what is the mean value?