Collecting, Presenting, and Interpreting Data

Content areas The process of collecting quantitative data Tabulation of data Representation of data Pictographs Pie charts Bar graphs Line graph Interpretation of data Deception of visual displays of data

Creating Graphs

Where Does the Data/ Information Come From? A question is asked. What kind of ice cream does everyone like in our class?

How Is the Information Gathered? A survey is made. Data is collected Data is tabulated

How Is the Information Gathered? Tabulation: Chocolate 1111 1 Vanilla 111 Strawberry 1111 Mint & Chip 1111 11 Rocky Road 11 Bubble Gum 1

How Is the Information Presented? A bar graph is made.

How Is the Information Presented? A bar graph is made.

An Example

Making a Graph The Graph: Sweets sold on a Monday Find the data Make a graph

The Graph It is easy to answer this question from a graph. There is only one set of data on this graph. What is the most popular sweet bought on Mondays? Mars

Choosing Graphs There are 2 sets of data on this graph. Is it easy to answer this question? What is the most popular sweet bought at the weekend? Try a different graph

Choosing Graphs There are 2 sets of data on this graph. Is it easy to answer this question? What is the most popular sweet bought at the weekend? Mars

Pie Chart

How Is the Information Presented? A pie chart is made.

How Is the Information Presented? A pie chart is made.

How Is the Information Presented? A line graph is made.

How Is the Information Presented? A pictograph is made. Chocolate Vanilla Strawberry Mint & Chip Rocky Road Bubble Gum

Making Pictograph Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 This table shows the colour of cars in a car park. Make a pictogram. Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 Look at the numbers. Choose the best unit. 1 picture = cars 10

The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow Key: 1 picture = cars 10 The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 Red White Green Silver Blue 50 ÷ 10 = 5 Yellow

The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow Key: 1 picture = cars 10 The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 Red White Green Silver Blue 35 ÷ 10 = 3½ Yellow

The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow Key: 1 picture = cars 10 The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 Red White Green Silver Blue 15 ÷ 10 = 1½ Yellow

The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow Key: 1 picture = cars 10 The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 Red White Green Silver Blue 20 ÷ 10 = 2 Yellow

The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow Key: 1 picture = cars 10 The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 Red White Green Silver Blue 45 ÷ 10 = 4½ Yellow

The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow Key: 1 picture = cars 10 The colour of cars Red 50 White 35 Green 15 Silver 20 Blue 45 Yellow 10 Red White Green Silver Blue 10 ÷ 10 = 1 Yellow

What is the least popular car colour in the car park? Key: 1 picture = cars 10 The colour of cars Red What is the least popular car colour in the car park? White Green Silver Blue Yellow

Tutorial Carry out a survey from two classes Collect the data Tabulate your data Present your data in graphical forms Justify your reason for choosing this particular graphical form. Present your table & graphs to your class Choose a suitable, relevant & interesting set of data.

Areas of survey State of origin No of siblings Hobbies Favorite TV channel Shoe size Genre of music Etc…