# WILCOXON SIGNED RANK TEST FOR PAIRED SAMPLE

WILCOXON SIGNED RANK TEST FOR PAIRED SAMPLE Introduction Mann Whitney U test assumes the samples to be independent of each other. But, the condition may not hold in reality; as in many cases the sample observations seem to be related pair wise. Wilcoxon signed rank test is used to test the equality of population means Read more about WILCOXON SIGNED RANK TEST FOR PAIRED SAMPLE[…]

# FRIEDMAN’S TEST

FRIEDMAN’S TEST INTRODUCTION Friedman’s Test is an extension of the Wilcoxon test. Wilcoxon test can be applied to repeated-measures data if participants are assessed on two occasions or matched in pairs. In contrast, Friedman’s Test allows the analysis for the same sample of data assessed on two or more occasions or conditions or matched-subjects. It Read more about FRIEDMAN’S TEST[…]

# TWO- SAMPLE SIGN TEST

TWO- SAMPLE SIGN TEST CASE ANALYSIS- 1 PROBLEM The following data represents the amount of money spent per month by 15 housewives in Foreign Brand cosmetic items and Indian Brand cosmetic items. Table-1: Sample Data The hypotheses for the analysis are: Null hypothesis-H0: The average amount spent on Foreign Brand cosmetic items and Indian Brand Read more about TWO- SAMPLE SIGN TEST[…]

# ONE – SAMPLE SIGN TEST

ONE – SAMPLE SIGN TEST                                                                                                            CASE ANALYSIS -1 PROBLEM A survey is conducted with 20 respondents to test the hypothesis that the median value of the time spent in a mall is 130 minutes against the hypothesis that it is more than 130 minutes. The time spent by the students is as follows. Read more about ONE – SAMPLE SIGN TEST[…]

# SIGN TEST

SIGN TEST INTRODUCTION Many statistical tests require the data to follow the normal distribution. Sometimes it is difficult to ascertain whether or not the data follow the normal distribution. In such cases it is necessary to use a statistical test that does not require the data to follow a particular distribution. Such a test is Read more about SIGN TEST[…]

# RUN TEST WITH NOMINAL SCALE MEASUREMENT

RUN TEST Run Test with Nominal Scale Measurement   CASE ANALYSIS – 1 PROBLEM A survey is conducted in a metro city whether the inhabitants are in favour (Y) or against (N) of ‘joint family’. The sequence of responses to the questions asked is given below. Table-1: Sample Data The interest is to test the Read more about RUN TEST WITH NOMINAL SCALE MEASUREMENT[…]

# RUN TEST WITH INTERVAL OR RATIO SCALE MEASUREMENT

RUN TEST Run Test with Interval or Ratio Scale Measurement CASE ANALYSIS – 1 PROBLEM A study is conducted to test the randomness of the sample stock prices as given below. Table-1: Input Data Null hypothesis-H0: The stock price is random in nature. Alternative Hypothesis- H1: The stock price is not random Performing the Analysis Read more about RUN TEST WITH INTERVAL OR RATIO SCALE MEASUREMENT[…]

# RUN TEST

RUN TEST Most of the significance tests based on Z, t and F distributions make use of the assumption that the sample drawn from the population is random in nature. Run test is used to test the randomness of the sample selected from the population. A ‘run’ is a sequence of repeated occurrence of a Read more about RUN TEST[…]

# CHI-SQUARE TEST FOR CROSS TABS

CHI-SQUARE TEST FOR CROSS TABS Chi-square test for Cross tabs is used to test the association of two variables under study.  The test forms a bivariate cross tabulation of the variables with the frequency for each cell. CASE ANALYSIS-1 We are attempting to find out if there is any significant relationship between the income and Read more about CHI-SQUARE TEST FOR CROSS TABS[…]