MannWhitneyUTesti

library(tidyverse)

## Warning: package 'tidyverse' was built under R version 4.5.2

## Warning: package 'ggplot2' was built under R version 4.5.2

## Warning: package 'tidyr' was built under R version 4.5.2

## Warning: package 'readr' was built under R version 4.5.2

## Warning: package 'purrr' was built under R version 4.5.2

## Warning: package 'stringr' was built under R version 4.5.2

## Warning: package 'forcats' was built under R version 4.5.2

## Warning: package 'lubridate' was built under R version 4.5.2

## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ──
## ✔ dplyr     1.1.4     ✔ readr     2.1.5
## ✔ forcats   1.0.1     ✔ stringr   1.6.0
## ✔ ggplot2   4.0.0     ✔ tibble    3.3.0
## ✔ lubridate 1.9.4     ✔ tidyr     1.3.1
## ✔ purrr     1.2.0     
## ── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
## ✖ dplyr::filter() masks stats::filter()
## ✖ dplyr::lag()    masks stats::lag()
## ℹ Use the conflicted package (<http://conflicted.r-lib.org/>) to force all conflicts to become errors

library(rstatix)

## Warning: package 'rstatix' was built under R version 4.5.3

## 
## Attaching package: 'rstatix'
## 
## The following object is masked from 'package:stats':
## 
##     filter

set.seed(123)
veri_u <- data.frame(
  Grup = as.factor(rep(c("Grup_A", "Grup_B"), each = 20)),
  Skor = c(round(rnorm(20, 15, 5), 1), round(rnorm(20, 10, 4), 1))
)

veri_u %>% group_by(Grup) %>% shapiro_test(Skor)

## # A tibble: 2 × 4
##   Grup   variable statistic     p
##   <fct>  <chr>        <dbl> <dbl>
## 1 Grup_A Skor         0.968 0.709
## 2 Grup_B Skor         0.955 0.451

wilcox.test(Skor ~ Grup, data = veri_u, exact = FALSE)

## 
##  Wilcoxon rank sum test with continuity correction
## 
## data:  Skor by Grup
## W = 334.5, p-value = 0.000288
## alternative hypothesis: true location shift is not equal to 0

veri_u %>% wilcox_effsize(Skor ~ Grup)

## # A tibble: 1 × 7
##   .y.   group1 group2 effsize    n1    n2 magnitude
## * <chr> <chr>  <chr>    <dbl> <int> <int> <ord>    
## 1 Skor  Grup_A Grup_B   0.575    20    20 large

ggplot(veri_u, aes(x = Grup, y = Skor, fill = Grup)) +
  geom_boxplot() +
  theme_minimal()