Apps. and Interpretation for IBDP Maths Ebook 1 | Page 342

Your Practice Set – Applications and Interpretation for IBDP Mathematics
SUMMARY POINTs
�
�
2
� goodness of fit test, for a contingency table with 1 row and c columns:
v
�c� 1: Degree of freedom
H
0
: The data follows an assigned distribution
H
1: The data does not follow an assigned distribution
H
0
is rejected if
� � C or the p -value is less than the significance level
2
calc
H
0
is not rejected if
level
t test:
t : t test statistic
� � C or the p -value is greater than the significance
2
calc
�
1
, �
2
: The population means of two groups of data
H
0
: �1 � �2
H
1: �1 �2
� , �1 � �2
(for 1-tailed test), �1 � �2
(for 2-tailed test)
H
0
is rejected if the p -value is less than the significance level
H
0
is not rejected if the p -value is greater than the significance level
Solutions of Chapter 23
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