Strand Math Sample
Level 3 Learning Outcomes:
- gain information from a variety of data displays.
- be aware of the type of data each display is appropriate for and the kind of pattern/relationship it best
communicates.
- link others’ claims with the appropriateness of displays used.
WALT: Sort data into categories
Wiremu is allowed to choose a pet for his birthday. He decides to find out what pets his classmates have.
He gives each classmate a blank data card, asks them to list any pets they have, and collects the cards.
With a classmate, discuss Wiremu’s data. Which information is necessary? Which information is unnecessary?
Which data is difficult to interpret?
Make a comment on one piece of data from above:
there is more necessary than unnecessary
Unnecessary group (why is it unnecessary?):
nothing, 0, no pets, none because he asked what pets do you have
Hard to interpret group (why is it hard to interpret?):
None unless you count my 2 goldfish in a bowl, my sister, 1 cat but she's at my mums Because i don't know what they mean.
The class next door did a similar survey to the one above but they were asked to name their favourite pet.
The results are shown on this tally chart and then presented on the bar graph:
Write three statements that interpret the data shown above:
the pets are completely different types e.g. horses and cats different sizes and personalty
the bar graph is easier to read because it has the amount of people / total number on it
people prefer cats (12) are more than Guinea pigs (4)
Discuss with a classmate which graph (bar graph or pie graph) you would prefer to use to show the information
and why?
the bar graph because it has the total on it and the pie graph has no numbers
What is the mean of the data above? (Show your working)
12+6+8+4 = 30
6+4= 10
12+8=20
10+20=30
30 divided by 4= 8r2
30 divided by 2= 15
15 divided by 2=
1 2 3 4
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
1 1
Personal Reflection:
I've done well with my organising with my sheet and finding out whats hard to interpret.
i need to work on finding the right way to work out the mean from data.