Correlation iNZight gives r. POSITIVE linear correlation r=1 "Perfect" 0.9
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Transcript of Correlation iNZight gives r. POSITIVE linear correlation r=1 "Perfect" 0.9
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correlation
iNZight gives r
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POSITIVE linear correlation
r=1 "Perfect"0.9<r<1 "Strong"
0.7<r<0.9 "Significant"0.5<r<0.7 “Moderate“
0.3<r<0.5 "Weak”0<r<0.3 "Not significant”
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NEGATIVE linear correlation
r=-1 "Perfect"-0.9<r<-1 "Strong"
-0.7<r<-0.9 "Significant"-0.5<r<-0.7 “Moderate“
-0.3<r<-0.5 "Weak”0<r<-0.3 "Not significant”
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LINKS TO HELP• http://www.bbc.co.uk/schools/gcsebitesize/maths/statistics/scatterdiagramsact.shtml• http://maths.nayland.school.nz/Year_13_Maths/3.9_Bivariate_data/7_Corr_Coefficient_r.html
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REMEMBER
• STATE THE OBVIOUS• POSITIVE OR NEGATIVE• INCREASING OR DECREASING• RELATIONSHIP OR NO RELATIONSHIP• LINEAR• EG: strong positive linear relationship• EG: as x increases, y increases…