CH08 nonparametric test.ppt

Chapter 8
nonparametric test
parameter test
t test and F test
The population distribution does not need strict supposition.
nonparametric test
range:
Measurement data:
1. The small sample data of non-normal distribution and homogeneity of variance ;
2. The small sample data of distribution unknown;
3. The data of unknown values in one or two ends (example <、> et al);
Rank data
Section 1
Wilcoxon signed-rank test
example 8-1 12 blood serum were measure ALT by A and B method (Table 8-1(2)、(3))is there difference between two groups of measure value ?
1. State hypothesis and significant level
2. Calculate T
Steps
3. P value and make decision
When n≤50,check T value table
If n>50,beyond the rang of value table,the method of normal approximately can be used.
paring between Median of one sample and population median
objective is deduce weather the difference exist between Median of one sample and population median or not.