# non parametric tests

1. ### Using non-parametric test

Hello Guys, I am beginner in SPSS. And I got a task. Can anyone please help me :) I want to describe my data in this table below, I want to find the p values between 2 groups (covid and non-covid) of various variables. is that correct to use non-parametric independent sample test? And what...
2. ### SPSS for Customer Satisfaction

I have data collected with 5 Likert Scale Questionnaire to establish factors influencing customer satisfaction using online banking. The factors included Credibility, Efficiency, Ease of Use, Security, Problem Handling and Product/Service Portfolio. A total of 6 independent variables. In this...
3. ### Compare non parametric distributions

I generated distributions of travel times of commuters using transportation simulation tools (for different scenarios). The distributions are attached below. I wish to statistically compare each pair of these non-parametric distributions. Q1. Which test should I use? There are some tests...
4. ### Determining Effect size for Quade Test

Hello everyone, I did a Quade Test as a non-parametric alternative of the one-factorial repeated measures ANOVA, as my data are not normally distributed. My experimental design includes one factor having 3 levels (t1, t2, t3). All 28 subjects are confronted with all levels (t1, t2, t3) making...
5. ### Kruskal-Wallis output problem

Hi everyone, I have some troubles understanding some result of my Kruskal-Wallis test: I want to compare a variable across these 3 independent groups, and since its distribution is not normal, I run a non-parametric test. The test tells me to reject the null hypothesis (p=.000). The mean rank...
6. ### Comparing groups that are not independent

I work with survey data and am interested in comparing the responses of different racial/ethnic groups. So for example, do the responses of White, Asian, Black, and Latinx differ significantly on question #1 in my survey. Race/ethnicity, however, is a "select all that apply" question. So, the...
7. ### Interpreting regression coefficients from non parametric regression in R (Rfit)

Hallo, I need to examine the relationship between an outcome variable (continuous) and a number of predictors. Since my data is non-normally distributed (i.e. the residuals from the multiple linear regression are not) I decided to use a rank-based regression using the Rfit function from the...
8. ### Stats analysis struggling

Hi, I am conducting an experiment where I am assesing 4 groups undergoing 2 treatments. 3 groups have recieved same treatment and 1 group has recieved the other treatment. I have averaged values of the 3 groups. It is a pre and post experiment. I want to compare the data for both pre groups...
9. ### Stats analysis struggling

Hi, I am conducting an experiment where I am assesing 4 groups undergoing 2 treatments. 3 groups have recieved same treatment and 1 group has recieved the other treatment. I have averaged values of the 3 groups. It is a pre and post experiment. I want to compare the data for both pre groups...
10. ### Statistical Analysis using Minitab

Hi, I am conducting an experiment where I am assesing 4 groups undergoing 2 treatments. 3 groups have recieved same treatment and 1 group has recieved the other treatment. I have averaged values of the 3 groups. It is a pre and post experiment. I want to compare the data for both pre groups...
11. ### Wilcoxon Rank Sum Test Question

2. Intermittent fasting (IF) consists of repetitive bouts of short-term fasting. It is of potential interest because it may provide a simple tool to improve insulin sensitivity in individuals with insulin resistance. (the latter increases the likelihood of type diabetes and heart disease). An...
12. ### Which tests to use in these examples? Wilcoxon etc.

I'm pretty clueless, but would appreciate any help very much. I have: Group 1: went from nothing, to receiving surgery 1, and then later on received surgery 2. -> A (before), B (after first surgery), C (after second surgery) Group 2: went from nothing to receiving surgery 1 -> A...
13. ### Doing Parametric Tests without normal distribution

Hello everyone! Is it true that when your sample is more than 30 people, you can do parametric tests, even though your sample may not follow the normal distribution? In my research I have 400 people as a sample, not following normal distribution and someone told me that I can do parametric...