Questions tagged [significance]
231 questions
1
vote
1 answer
Compute statistical significance with Excel
I have 2 columns and multiple rows of data in excel. Each column represents an algorithm and the values in rows are the results of these algorithms with different parameters. I want to make statistical significance test of these two algorithms with…
someone
- 381
- 3
- 5
- 14
1
vote
1 answer
How to make specific pairwise comparisons in R
I have some code that I have inherited that generates a matrix of significance levels for pairwise comparisons from predicted means. Since the model includes data from multiple sites and treatments, but I only want to compare between genotypes…
alexwhan
- 15,636
- 5
- 52
- 66
0
votes
0 answers
Adding p-value brackets to ggplot with two grouping variables for stats and a faceting variable?
I have a large data set with several variables I want to take into account when graphing. Two are grouping variables, and one is the variable used for statistics. One of the grouping variables will be the fill in the plot, and the other will be the…
0
votes
0 answers
Add comparisons onto facet_wrap2 plot
I have a plot of four locations and in each locations there are sets of three boxplots for three years.
I have a table of pairwise comparisons to show significance.
I'm interested in adding in significance labels to indicate pairs that are not…
Melanie Baker
- 449
- 1
- 13
0
votes
0 answers
Problems with fixed effects for a Mixed Linear Model in R
we want to analyze a Mixed Linear Model. One of the fixed effects (POSITION) has a z-value of 0 and a p-value of 1, despite it should have a significant effect (a graph shows it and it is correct in substance). Do you know how we can fix that issue?…
seboe
- 13
- 3
0
votes
0 answers
Correlation matrix using * for significance level
How to plot the Significance codes in a correlation matrix
Signif. codes: 0 ‘’ 0.001 ‘’ 0.01 ‘’ 0.05 ‘.’ 0.1 ‘ ’ 1
Like this:
I've tried the followed code:
library(corrplot)
p.matc <- ggcorrplot::cor_pmat(mtcars)
testResc = cor.mtest(mtcars,…
Marcel
- 147
- 4
0
votes
0 answers
How to create a table for lasso regression?
I use Lasso and a linear regression for feature selection. I want a table that includes the coefficients but also the significance of a variable. I first used SKlearn, but SKlearn does not create these kind of tables. Thus, I tried to create them…
J1999
- 3
- 2
0
votes
0 answers
How to determine which statistical test to perform?
I am stepping trying to perform a couple of statistical tests to determine significance from categorical variables (e.g., treatment, station)
the experiment is microcosms with freshwater amended 2 different types of oil to measure degradation. 3…
user20796953
0
votes
0 answers
How to find P-values for ATT in PSM
I have estimated ATT in PSM using psmatch2 command.
I get only the T-stat values for the ATT.
How to determine the significance level? How to know whether I should use * or ** or ***?
I ran the following command
estimates table, star(.05 .01…
President Iron
- 1
- 1
0
votes
0 answers
Why does estimate_contrasts from the modelbased package for R result in 95% CI that includes zero when p < 0.05?
I fit a linear mixed-effects model using lmer from lme4 with the formula:
Response ~ Age + Gender + tOrder + Condition * Scale + (1|Participant)
I used estimate_contrasts from the modelbased package for R:
(mbc <-…
user8189397
- 11
- 2
0
votes
0 answers
How can I get p value for Cronbach alpha?
We assessed internal consistence reliability of a questionnaire (with seven item). The Cronbach alpha value was 0.79. However, I can't get its p value. What Stata commands shall I use?
I tried it with bootstrap but the output is only confidence…
Melese Siyoum
- 1
- 2
0
votes
1 answer
How to get the significance level in plot R
I want to add the signifiacnce level for each points of my plot and then, separate the different level of significance by color
I have this data…
lobarth
- 43
- 6
0
votes
0 answers
geom_signif and geom_bar/ggplot overlay problems
geom_signif only applied to the first protein facet. The error message I get is "Warning: cannot compute exact p-value with ties"
ggplot(data = RecoveryStatistics, mapping = aes(x = Method, y = Recovery, fill = ProtChain))+
geom_bar(stat =…
Victoria Rees
- 13
- 3
0
votes
1 answer
SIMPER test: only return species of statistical significance?
I am a little new to conducting microbiome analyses and doing it in R. I am interested in performing a SIMPER test to see what species are driving compositional differences in different sampling sites. I was successful in performing the SIMPER test…
user20796953
0
votes
0 answers
Add significance star to boxplot when we have 2 grouping variables on the X axis
Can you please help me create this typical plot? It is no big deal to get things done when we want to compare between two species of the iris data, but when we add another grouping variable, things don’t seem to work.
I want to compare between…
mokdur
- 3
- 3