Term 2 Statistics

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: Petty differences.

Unnecessary group (why is it unnecessary?): my sister because your sister is not a animal.

Hard to interpret group  (why is it hard to interpret?): 3 birds one is sick and being treated

WALT: Interpret and communicate findings about data

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:

1. . There were 30 people surveyed

2. 6 people like dogs 4 people like guinea pigs 12 people like cats 8 people like horses  

3.  the bar graph is telling me that some kids like dogs, horses ect

Discuss with a classmate which graph (bar graph or pie graph) you would prefer to use to
show the information and why?

I would prefer the bar graph because its easier to understand and is clearly layed out

What is the mean of the data above? (Show your working) 12+8+6+4=30 30 divided by 4 =7.5 is the mean

Personal Reflection: i found the hard to interperit question hard to answer but my next step is to stay focused.
My next step in statistics is to create my own graphs.