Analysis and Approaches for IBDP Maths Ebook 1 | 页面 297

Front Page
Chapter
22
Bivariate Analysis
SUMMARY POINTs
�
Correlations:
Positive
Negative
where r is the correlation coefficient
Strong 0.75 �r
� 1
Moderate 0.5 �r
� 0.75
Weak 0 �r
� 0.5
No r � 0
Weak �0.5 � r � 0
Moderate �0.75 � r � � 0.5
Strong �1� r � � 0.75
22
�
Linear regression:
1. y �ax � b : Regression line of y on x
2. x �ay � b : Regression line of x on y
Solutions of Chapter 22
289
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