What is primary data
Observed or collected from 1st hand experience
What is used on a dot plot to represent data
Dots
A line graph shows a change over .......?
time
Give an example of categorical data?
colour, brand, car make etc
A bar graph represents data using only horizontal bars: True or False
False: Bars can be horizontal or vertical
This is found on a pictograph and tells us how many each picture stands for
A Key
1
Line graphs are made by connecting a series of ....?
Dots
What is the difference between a sample and a census?
Census surveys the whole population but the sample survey part of the population.
How many people voted in the survey about favorite colors?
15
A collection of facts, such as numbers, words, measurements or observations that is organised on a table
Data
5
How many grey and black seashells are there?
7
What is secondary data?
It is collected from other parties.
Which camp activity is the most popular
swimming
A graph that records each piece of data on a number line
Dot Plot
How many people were surveyed?
23
How many apples were sold in January and February combined?
50
Give two examples of numerical continuous data
Temperature, weight, length
Which soccer players scored the least points
Billy and Sean both scored only 10 points
This type of graph can be vertical or horizontal
bar graphs
Compare the two dot plots
They are the opposite to each other.
Most people surveyed exercise less than 4 hours while play video games for more than 6 hours.
If 800 people were surveyed, how many said that sausage pizzas were their favourite?
120
What is the difference between numerical discrete data and numerical continuous data
Numerical discrete data can be counted while numerical continuous data can be measured.
People ANALYZE data in bar graphs to draw conclusions and make comparisons. What does ANALYZE mean
To study closely