Questions tagged [proportion]
A proportion is the fraction of some total that is of a particular kind, either (i) as a count of one type of thing out of a total count, or (ii) as a component of a continuous variable.
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Compare the proportion of multiple diseases between 2 groups
I'm conducting an analysis on data derived from two groups subjected to different environmental conditions. Here's a brief overview:
Group A: 750 individuals exposed to smoke.
Group B: 1500 ...
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Can I use Multinomial Logistic Regression's probabilities as proxies for proportions?
Summary of the Problem:
I am exploring methods to simultaneously predict the proportions of different tree species within 250 square meter forest plots using ALS (Airborne Laser Scanning) and spectral ...
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How can I show statistically that one of my replicates is likely contaminated?
I have a dataset that looks like the below: five replicate samples, each of which is composed of 4 different fractions that sum to 100%. The fifth sample clearly looks visually distinct from the other ...
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confidence intervals for proportions containing a theoretically impossible value (zero)
This is really a hypothetical question not related to an actual issue I have, so this question is just out of curiosity. I'm aware of this other related question What should I do when a confidence ...
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What test should I use for Weighted Mean Proportions?
I want to know if the "weighted mean proportion" of a racial group in the organization (overall) is significantly different from the "weighted mean proportion" of the group within ...
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Comparison of proportions within one group but between two different questions: One-sample or two-sample z-test?
I have 300 participants who answered several questions in a questionnaire on a five-point Likert scale. I want to compare the proportion of the answers of either 1 or 2 with the proportion of the ...
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Logistic regression for experimental inference?
I'm curious if logistic regression is appropriate when the task is inferring a treatment effect on proportions (ex: success rate) when covariates are present and some imbalance across treatment and ...
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Correlation between proportion variable and categorical variable
I am interested in testing for the correlation between influenza activity and different periods (different decades). The variable influenza activity is a combination of two variables: ILI proportion (...
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Sample size for a vector of proportions and simulation
Currently, there are more than 10 variants of omicron virus.
Say, variant proportions are X1=0.1, X2=0.35, X3=0.15, etc. I need to calculate the number of samples needed to detect the proportion of ...
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How to estimate the confidence interval of a very small proportion? [duplicate]
I want to the estimate the confidence interval of a very small proportion. Let's say I have simple random sample of 1000 and 4 people answered the question with yes. One might want to make use of the ...
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Statistical test to see whether one group is larger than the other
I have a data set that contains percentages of benefits provided in 2 groups from 2020 to 2023. Any statistical test I can use to test whether the percentages for group A are greater than the ones for ...
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comparing multiple proportions between three groups
Let's say I have a program that generates characters for a game. There are three types of characters: animal, human, and spirit. It also generates a "strength" rating for each character. The ...
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Repeated measurements of proportions with no information on individual subjects
I am working on a dataset (not mine) that includes repeated measurements of proportions, measured at 50 equally spaced time points. There are two groups. Group A has 65 individuals, and group B has 23 ...
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I am trying to fit a mixed-effects model with a proportion as the response. I'm stumped on which distribution fits my model
Currently, this is my best-fit model. dHARMA does not look great. The response has many zeroes and many 1's
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Confusion about the chi-squared test to compare 3 proportions
I have run an within-subjects experiment in which each participants answers to 3 binary questions (A,B and C). This means that all participants answered every questions.
I want to compare the ...
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