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PERTH COLLEGE
YEAR 10 MATHEMATICS: EXTENDED AND SPECIALIST
SEMESTER 1 2020
INVESTIGATION 2 PART A
Name: ________________________________
Part A is due on Monday, May 4. It will be checked for completion on this day.
Solutions will be posted on your OneNote by the end of the day and you should
check your work carefully and seek help with anything you are unsure about.
Part B will be completed during class time on Thursday, May 7.
You may use Part A and your ClassPad calculator to assist you with Part B.
BIVARIATE DATA AND ANALYSIS
Bivariate data and its related analysis examines the statistics for two variables and
examines whether there may be a statistical relationship between them. For our
purposes, we will examine only whether there is a linear relationship between any two
given variables.
To begin it’s useful to have a visual representation of the data with which we are
working. To achieve this, we draw a Scattergraph.
Task 1:
The table given shows 15 students. For each student, the distance they live from school
(rounded to the nearest km) and the number of times they have been late to school has
been recorded.
(a) Plot each of the 15 students on the set of axes given below.
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(b) What can you say about the relationship between the distance from school and
the number of times a student at this school is late?
Task 2: Using the ClassPad to draw a Scattergraph
Follow the steps and screenshots below to draw a Scattergraph of the data from Task 1
using your ClassPad.
From the Menu choose Statistics, and then enter the distances in List 1 and the number
of lates in List 2.
Go to SetGraph, Setting and choose Scatter for the Type, then press Set.
Now click the graph button, top left, and your Scattergraph will appear.
Task 3: Describing the linear relationship from the scattergraph
Read page 354 and 355 of the PDF on the OneNote titled “Bivariate Data Exercise
(Pearson)” and summarise your findings below.
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