Nonparametric Test Flashcards
(16 cards)
When is non-parametric test used?
When nature of distribution is not known or known to be non -normal
What are other names for non parametric test
Distribution free statistics
What type of data does non-parametric test use?
Nominal and ordinal
What are the non-parametric test procechines
Data measured on any scale:
Ratio or internal
Nominal
Ordinal
What are the types of nonnormal distribution
Flat distribution
Peaked distribution
Skewed distribution
What is distribution free test
Does not rely on assumption about the probability distribution of the sampled population
The branch of inferential statistics that is devoted to distribution free test is known as?
Non-parametrics
Non-parametric statistics based on the ranks of measurement is known as?
Rank statistics
What are the advantage of non-parametric test?
- used with all scales
- make fewer assumptions
What are the disadvantage of non-parametric test?
- difficult to compute by hand for large sample
- tables not widely available
What are the frequently used non-parametric test
Sign-test
Wilcoxon rank sum test
Wilcoxon signed rank test
Kruskal Wallis test
Spearman’s rank correlation coefficient
Which test, test one population median, is equivalent fo the t test for one mean and assume population is continuous
Sign test
Which test:
Test two independent population probability distributions
Equivalent to t test for two independent means
Assumes independent random samples, and population are continuous
Wilcoxon rank sum test
Test probability distribution of two related population
Equivalent to t test for dependent o paired means
Assumes random samples and both population are continuous
Wilcoxon signed rank test
Test equality of more than two population probability distribution
Equivalent to ANOVA for more than two means
Analyze completely randomized experimental designs
Kruskal-Wallis test
Measures correlation between ranks
Equivalent to the Pearson product moment correlation
coefficient
Values ranges from -1 to +1
Spearman’s rank correlation coefficient
