scatter plots – age and reaction time by: heather, robyn & ryan
TRANSCRIPT
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Scatter Plots – Age and Reaction Time
By: Heather, Robyn & Ryan
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Digital Resource 1http://www.youtube.com/watch?v=9Iw3a_LtJVE
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OverviewDeclarative and procedural knowledge.Defining the Key terms.Why do we use scatter plots?Time for you to create a scatter plot.Using a scatter plot to make predictions.Quick quizMathematical worth of additional three
digital resources.
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Declarative & Procedural KnowledgeDeclarative Knowledge Procedural Knowledge
• Key terms:-
scatter plot (scatter diagram),
line of best fit, trend line,
positive and negative relationship/correlation;
Bivariate data;
• Appropriate use of graphs and how to apply this learning.
• How to read and interpret the various patterns and variables of a scatter plot.
• Identify scatter plot trends and make predictions
• Identify uses for scatter plots.
• Create a scatter plot.
• Interpret authentic data to draw conclusions.
• Analyse data and recognise patterns.
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Definitions Scatter Diagram – A graph of plotted points that show the
relationship between two sets of data.
Correlation – When the two sets of data are linked together; Co (meaning ‘together’), and Relation.◦ You will also see the words, Relationship and association.
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DefinitionsPositive Correlation – When the values
increase together.Negative Correlation – When one values
decrease and the other increases.No Correlation - Where a change in one
set of data has no effect on the other set.
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DefinitionsLine of best fit – To find the direction of a
correlation between two variables.Trend line - A line on a graph indicating a
statistical trend
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DefinitionsBivariate data - a set up of data made up
of two variables.For example, comparing height to weight
or age to reaction time.
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Scatter Plot Data:Age Reaction Time
18 0.43
22 0.43
28 0.45
32 0.45
38 0.46
42 0.46
48 0.47
52 0.47
58 0.48
62 0.50
68 0.52
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Age vs. Braking reaction time(Stopping a car)
5 15 25 35 45 55 65 750.42
0.44
0.46
0.48
0.5
0.52
0.54
Reaction TimeLine of best fit
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Age vs. Braking reaction time(Stopping a car)
5 15 25 35 45 55 65 750.42
0.44
0.46
0.48
0.5
0.52
0.54
Reaction TimeLine of best fitLine of Best fit
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What Relationship is this?Does the increase in temperature impact
sunscreen sales? What do you think this scatter plot would look like?
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What Relationship is this?If the price of bananas increase does this
effect the amount of bananas sold? What would this scatter plot relationship look like?
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What Relationship is this?If we plotted how old you are, and the
results you got for your maths test, what correlation is there?
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Visit our wiki to find out more
http://mathshrr.wikispaces.com
Thank you