NON PARAMETRIC Flashcards
is used test is used when the population from which the samples are selected is not normally distributed or distributed in any other particular way.
nonparametric test
are used to test hypotheses about population parameters when the assumption about normality cannot be met.
Nonparametric Statistical Tests
Give at least 2-3 advantages of Non parametric tests
They can be used to test population parameters when the variable is not normally distributed.
They can be used when the data are nominal or ordinal.
They can be used to test hypothesis that do not involve population parameters.
In some cases, the computations are easier than those for the parametric counterparts
They are easy to understand.
There are fewer assumptions that have to be met, and the assumptions are easier to verify.
Give 2-3 disadvantages of Non parametric test
They are less sensitive than their parametric counterparts when the assumptions of the parametric methods are met. Therefore, larger differences are needed before the null hypothesis can be rejected
They tend to use less information than the parametric tests.
They are less efficient than their parametric counterparts when the assumptions of the parametric methods are met. That is, larger samples sizes, are needed to overcome the loss of information
is the positioning of a data value in a data array according to some rating scale
Ranking
What happens if two or more speakers receive the same number of points?
Add the two same ranks and divide by and divide to the number of the same ranks
What table is used to find the critical value for the sign test
Table J
___ the null hypothesis if the smaller number of positive or negative signs is less than or equal to the value in the table.
x </= crit
Reject
The test value for sign test is the number of
less frequent signs
The sign test for a single sample is a nonparametric test used to test the value of a population ______
median
Sign test is non-parametric version of
one-sample t test
Used to find the crit value for sign test
J table
Alpha
N-0
In sign test, the test value is____
Count the number of + and - signs in step 2, and use the smaller value as the test value.
If the test value is less than or equal to the critical value, the null hypothesis is
Rejected
WILCOXON RANK SUM TEST: The nonparametric equivalent to the
independent t test
WILCOXON RANK SUM TEST is also called
Mann-Whitney Test or Mann-Whitney U test
WILCOXON RANK SUM TEST:
Samples are random and must be
The size of each sample test is a nonparametric test that to
greater than or equal
10
test two independent samples uses ranks to determine if populations that have the same were selected from distributions.
Wilcoxon rank sum
WILCOXON SIGNED-RANK TEST
Non-parametric equivalent to the
paired t-test for dependent samples
is a nonparametric test used to test whether two dependent samples have been selected from two populations having the same distributions.
Wilcoxon signed-rank test
KRUSKAL-WALLIS TEST
Non-parametric equivalent of
one way ANOVA
KRUSKAL-WALLIS TEST alao known as the
H test
Can be used to compare three or more means
Size of the sample must be at least 5
KRUSKAL-WALLIS TEST
test is a nonparametric test that is used to determine whether three or more samples came from populations with the same distributions.
The Kruskal-Wallis
SPEARMAN RANK CORRELATION COEFFICIENT
Non parametric equivalent to the
Pearson coefficient
Use to investigate whether two variables are related by analyzing the ranks of matched-pair data
SPEARMAN RANK CORRELATION COEFFICIENT
The ___________________ is a nonparametric statistic that uses ranks to determine if there is a relationship between two variables
Spearman rank correlation coefficient
