19
Statistical Tests
SUMMARY POINTs
�
More about All expected frequencies
2
� test for independence and E i should be greater than 5
2
� goodness of fit test :
19
�
Z test when the population variance
� : Population mean H
0
: � � �0
H
1: � �0
2
� is known :
� , � � �0
( for 1-tailed test ), � � �0
( 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
�
One sample t test when the population variance
� : Population mean H
0
: � � �0
H
1: � �0
2
� is unknown :
� , � � �0
( for 1-tailed test ), � � �0
( 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
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