Questions tagged [significance]
231 questions
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R: Significance test, two proportions, one sample
I am trying to find out if two proportions from the same sample are different or not.
(let's imagine) I have a sample with 200 answers: 120 like Party A
, 100 like Party B
It is possible to like two parties at the same time.
I would like to test…
indirectly
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Quantify the significance of a slope
This is more of a technical question rather than coding. Is it possible to test whether the slope of a data set is significant or not?
So I have the following plot:
I managed to determine the slope of this blue geom_smooth line, which is basically…
evian_bottle
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How to compute the significant difference in two dataset in R?
I have two numeric vectors each shows the days we need to do different tasks: a using new technology versus in b using a old technology
a <- c(10, 59, 30, 5)
b<- c(19, 70, 50, 25)
I need to know is there a significant difference between a and b?…
samira n
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Comparing significance level to p-value in a two sided test
I had a p-value of 0.608.
For a two-sided test scenario,
If I take 95% confidence i.e. 5% significance or alpha = 0.05,
In that case,
should we say, the answer to task be:
"0.608 > 0.025, therefore, we cannot reject null hypothesis.??"
OR, we should…
Sri2110
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Which p-value thresholds for a two-sided 90% confidence interval?
I'm running an A/B test, and I want to check for statistical significance with 90% confidence two-sided. I've calculated standard errors, z-scores and p-values.
I'm saying that I have significance when my p-value is lower than 0.1 and greater than…
xcentralx
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statistical test in r to show significant difference between groups
I am working with small scale survey data in r.
I would be grateful for input on what would be best/most simple test to use to show any row-wise significance between group differences for a series of options (opt1-opt9). When my data is…
adame
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Tukey significance lines in box plot in R
I am trying to add significance lines in my boxplot using the following syntax:
> my_comparisons <- list( c("Cluster 2L", "Cluster 1L"), c("Cluster 3L",
> "Cluster 1L"), c("Cluster 3L", "Cluster 2L") )
>
> B2 <- ggboxplot(VCPedu_LOW, x =…
Valérie
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Why does significance change due to switching reference categories in dummy-coded multiple regression within R?
I have a problem with dummy-coded multiple regression in R. I realised that when I switch reference categories under certain circumstances - that I can't specify yet - the result changes. So effects that haven't been significant become significant…
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Adding Statistical Significance Annotations to Barplot Subplots
I've been trying to figure out how to add statistical significance bars to specific subplots. Most related questions have been specific to a single plot, but does not show how to arbitrarily add statistical annotations to a subplot. Can someone show…
brownranger
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How to find out whether coefficients of different quantiles are significantly different in a quantile regression? (SPSS or Python)
I'm examining whether the rates of increase in income within a certain profession are significantly different in different parts of the income distribution, to see if the income gap is significantly stretching or closing.
THE QUANTREG MODEL
I have…
Haiying
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Random number from a probability distribution
I have read in a recent metaheuristic algorithm that a random number is drawn from a uniform distribution.Is there any difference/ significance in the nature of random number drawn from Normal distribution and Gaussian Distribution/Poisson…
user3284709
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How can I show significant comparisons from Tukey post-hoc test in ggplot2 bar plot?
I have a dataset with several variables that looks like this:
Competitor Disturbance Group MT CVt
1 M P A 17.416667 63.39274
2 M P A 11.055556 91.32450
3 M …
Ginevra B
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pooled model summary not showing R squared or adjusted R Squared
I'm using imputed data (via r-MICE) to carry out some linear regressions.
eg:
fitimp2 <- with(impdatlong_mids,
lm(nat11 ~ sex + AGE +
I(fasbathroom + fasbedroom + fascomputers +
fasdishwash + fasfamcar +…
pandfny
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Extract sample variance from svykm (survey package by Lumley) for complex survey analysis
In order to compare two survival curves at a fixed point in time and perform basically a two sample test, I need to extract the sample variance of the estimate at a given point in time.
For an object created with the svykm function from Thomas…
k_wy
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ANOVA is significant but post-hoc test not. What next?
The data consists of weights of fresh harvested plants with four different treatments. The data is normally distributed and homogeneity of variances is given too.
Anova shows significiant differences:
anova_Ernte <- aov(Gewicht ~ Variante,…
GinSonic
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