Description Usage Arguments Value Examples
This function produce two-sample t-test (two-tailed with confident interval at 0.95) results for multiple sub-groups and provides with a nice output in a table format. It can also add adjusted p values for multiple comparison issue.
1 | t_test_two_sample(data, x, y, paired = FALSE, p_adjust = "bonferroni")
|
data |
A grouped data frame. It should be grouped by the intended sub-groups which you want to do the same t-test. |
x |
Column name of the variable which contains data values that you want to test (see t.test and details). |
y |
Column name of the variable which contains data values of group assignments for the test values (see t.test and details). |
paired |
a logical indicating whether you want a paired t-test. |
p_adjust |
|
A data.frame
with the t-statistics table
consisting of characters. The columns that are always present are:
group variable(s)
, tvalue
, df
(degrees of freedom), p
, and p_adjustmethod(s)
.
1 2 3 4 5 6 7 8 | t_test_two_sample(color_index_two_sample, x = "color_effect", y = "group", paired = TRUE)
# use bonferroni and fdr method for adjusted p values.
library(magrittr)
color_index_two_sample %>%
t_test_two_sample(
x = "color_effect", y = "group", paired = TRUE, p_adjust = c("bonferroni","fdr")
)
|
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