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# Questions tagged [percentage]

Number or ratio expressed as a portion of 100

22 questions
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3answers
8k views

### What are the issues with using percentage outcome in linear regression?

I have a study where many outcomes are represented like percentages and I'm using multiple linear regressions to asses the effect of some categorical variables on these outcomes. I was wondering, ...
4answers
1k views

### Dungeons & Dragons Attack hit probability success percentage

In D&D players roll a 20 sided die trying to beat a set number to determine if an attack hits the target. Players often can add modifiers to this roll to help the odds in reaching this target ...
1answer
160 views

### Judging the quality of a statistical model for a percentage

I have a data set with multiple predictors, and a single response variable which is a percentage, thus is bounded between 0 and 100. I cannot share the dataset unfortunately. I would like to build a ...
10answers
9k views

### Why is 600 out of 1000 more convincing than 6 out of 10?

Look at this excerpt from "The study skills handbook", Palgrave, 2012, by Stella Cottrell, page 155: Percentages Notice when percentages are given. Suppose, instead, the statement above read: ...
7answers
2k views

### What kind of curve (or model) should I fit to my percentage data?

I am trying to create a figure which shows the relationship between viral copies and genome coverage (GCC). This is what my data looks like: At first, I just plotted a linear regression but my ...
1answer
202 views

### On average of percents

I have read some pages about how to calculate the average of percents. However, still I don't understand something... Assume data points are organized in the following manner: We have two categories ...
2answers
11k views

### What regression model to use when independent variables are percentages to predict % outcome?

"Independent" variables: time spent (% at work, % sleeping, % exercising), body mass composition (% fat, % muscle, % bone) Dependent variable: Smoker (1) or Non-Smoker (0) What kind of regression ...
5answers
87k views

### Percentile vs quantile vs quartile

What is the difference between the three terms below? percentile quantile quartile
4answers
9k views

### Is 50% 100% higher than 25% or is it 25% higher than 25%?

If I have two values A and B which are both expressed as a percentage of C, and I want to express the difference in magnitude between A and B as a percentage D, is it more correct to express D as a ...
1answer
6k views

### Mixture of beta distributions: full example

I have a vector of measured proportions and want to test if these proportions follow a bimodal distribution characterize the two underlying distributions determine for each data point which ...
3answers
8k views

### Correlation between a percentage and a real number

I have two datasets, one containing the percentage of people with flu and one which has the number of searches for Tea-recipes in google. Problem is, I get different results when i choose to include ...
5answers
12k views

### How to convert sport odds into percentage?

I am wondering how to convert sport odds to the percentage format. There's this example: ...
2answers
4k views

### Is it correct to model percent change as a continuous variable?

I have data from a longitudinal study where there are 46 subjects, each with 13 observations over time on a given outcome measure. A prior analysis conducted on this data performed a linear mixed ...
1answer
284 views

### Deal with percentage data

For instance, I have such data: ...
2answers
2k views

### T-test on percentage values (among experimental replicate values)

My experiment involves looking at the precentage of cells in a slide that have a particular property under condition A and condition B. I have one slide for each condition. I have done this experiment ...
1answer
51 views

### Sum of all covariables value per patient is 1

I have a database with only 27 patients, and each patient was analyzed for the more than 119 different bacterial species. We test the percentage of each bacterial species among all the 119 species for ...
1answer
14k views

### Chi Square Analysis Percentages

I've used chi-square analysis in school, but was absent for the lesson, and I never quite got the hang of it. I've been successful with it in the past, but now I'm trying to use percentage values, and ...
1answer
68 views

### Modelling a percentge as a dependent variable

I have a dataset containing 4 variables: Y - the dependent variable. This is a percentage of students in a school that choose to take an external exam. The values vary from 20% to 70%. X - the ...
0answers
613 views

### Percentages from non binomial data: is ANOVA / Kruskal-Wallis appropriate?

I know ANOVA with percentages as already been discussed (Using ANOVA on percentages?) and (ANOVA-like test for bounded variables (percentages)), but the variables seemed different from my case. ...
1answer
331 views

### Can I use a binomial model with logit link function when dealing with continuous proportions?

I have continuous proportion data (i.e. ranges from 0 to 1). Or it could be percentage too if multiplied by 100. This is the proportion/percentage of overlap in home range between animals, therefore I ...
0answers
54 views

### Ratio measure vs. difference measure?

I am comparing food inflation estimates from different sources for the same year and country. Food inflation can be negative or positive, e.g. year 2010: 5% in Source A and 7.5% in Source B; year 2011 ...
1answer
457 views

### Percentile from z-score

I have this question which i am so confused how to solve it this is on normal curve. The following table is used to determine the student’s grades: ...