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Questions tagged [percentage]

Number or ratio expressed as a portion of 100

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6 views

percent change from baseline

i have a 10 samples with baseline and follow up scores. I need to calculate a percentage increase or decrease based on the scoring scale, in this case its 0-56, and the objective (whether the ...
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0answers
26 views

Percentage data as one of features in machine learning [closed]

in my dataset I have two features with numerical percentage data. The distribution of the data is extremly skewed like you can see on the picture. Is this data useful as one of the features for ...
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1answer
171 views

Testing statistical significance of three percentages with ANOVA?

I want to compare the mortality rates of three groups. Can I use ANOVA? If so, how will I deal with the percentages?
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1answer
176 views

transformation of response variable which is in percentage

Here's my data. https://www.dropbox.com/s/puf57efqkdl8zt0/data.csv?dl=0 It's too big, therefore I did not know to use the dput(data) command. I am using a ...
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2answers
256 views

How do I test difference in Percentages?

I have some survey data and know the number and percentage of "yes" responses. How do I determine if any of the percentage yes regional responses are statistically different from the national yes ...
2
votes
1answer
60 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 ...
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1answer
20 views

Statistic to measure no.of cancelled members

These percentages indicate how many male vs female members cancelled a subscription we offer. Male Female 22% 13% Looking at the ...
2
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0answers
33 views

Comparison of categorical percentages

I apologize if this has been asked, but I couldn't seem to find an answer anywhere. I have two sets of data. Each is made up of 5 categories. These categories are ordinal as they are a 5 point ...
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2answers
37 views

Distance measure for binary arrays

Basically if I have binary sequence that I want to check against, and I want to determine how far other binary sequences are to this first sequence, what is the most appropriate measure to use. The ...
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0answers
8 views

How to create a scale combining normalized percentile scores to get an overall result

I am trying to work out a scale for assessing a person’s risk for a particular behavior (like rob a bank). The likelihood of this behavior occurring or not occurring will be based on scores for a ...
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0answers
22 views

How do I convert a survey scale [7-point, -3 to 3] to a 7-point scale [1-7]?

I am working with a survey scale that is from -3 to 3. I have a mean value of .94 and I want to identify if there are ceiling effects, but I need to change the entire scale to 1-7 in order to ...
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0answers
18 views

Interaction effects for independent variables in percentages

If the Independent variables are in percentages, then will it make sense to calculate interaction effects using the original figures? or do I need to make any changes?
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1answer
15 views

Regression equation using percentage values in R : Request your help for a beginner

Can percentage values be independant variables? Can I use then as it is, or do I need to take log. And also if I have to consider interaction effects when independent variables are percentages, how ...
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3answers
7k 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, ...
71
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5answers
78k views

Percentile vs quantile vs quartile

What is the difference between the three terms below? percentile quantile quartile
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votes
1answer
25 views

Comparing percentages based on likert scale by year

I'm reviewing an analysis someone else has done on some Likert scale data. They've assigned each point on the scale 1-5 (1 = bad, 2 = poor etc.), found the average score in each area, and then ...
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0answers
44 views

Modelling percentage and proportion data with GLM's [duplicate]

I would like a simple answer, if there is one, to a question I cannot seem to find on here. What is the best way to model percentages? Say I have a glass that is empty and I fill it with liquid ...
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0answers
11 views

Average percentages [duplicate]

Hi I am trying to average percentages but what each percentage represents is not equal. The 5 numbers are : 100%, 0%, 0%, 20%, 75% 100% represents 4 items 20% represents 10 items 75% ...
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1answer
25 views

Is it reasonable to display “percentage data” in a boxplot, why?

I have data that are in fact percentages of C (bound to clay) combusted in a certain temperature interval. Exemplary data: ...
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0answers
5 views

What model should I use if I want to describe the relationship between the % and binary outcome

I want to model a relationship between the % of students who received a flu vaccine at a certain school and whether their school had a flu outbreak or not. Thanks
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1answer
392 views

Comparing a distribution of percentages

I have two populations that I would like to compare, each of which contains N samples. Each sample itself contains many events that can be categorized into 20 different, mutually exclusive, categories....
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1answer
35 views

What statistics test to compare the repartition of multiple choices between two groups?

I made an experiment about UX where the participant has to detect among five differents configurations the one that he prefers. The configurations are slightly different and are presented randomly 3 ...
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0answers
8 views

Comparing percentages from survey results with different response rate

I have to compare survey results based on a questionnaire floated. Out of total 50 questions, A responded for 40 questions. Out of 40 questions responded, answer for 30 questions are Yes. Out of ...
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0answers
44 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 ...
2
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2answers
982 views

Comparing retention rates with differing sample sizes

I'm looking to compare the retention rate of people who attended an event and those who did not. The list of those who did not (70) is significantly larger than those who have (28). Here is an ...
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0answers
470 views

Should descriptive statistics on percentages data be weighted?

I'm trying to put together descriptive statistics for a set of differently sized groups of students. For each group of students, let's say I know the # of students who are left handed. I'd like to ...
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1answer
72 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 ...
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0answers
17 views

regression with percentage DV and multiple dummy IV

I am running a market analysis about e-mail responses for my marketing class. I have the following data entries: Observations: 400 different sequences of e-mails where sent to different target ...
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1answer
64 views

Regression Relationship Between Fraction and Whole Number

I am trying to determine the best regression model to use to determine if there is a relationship between clicks (independent variable) (represented as a whole ...
4
votes
1answer
2k views

Percentages as the response variable in GLMM (glmer), proportional binomial or not?

After looking through several questions on stackexchange, and even applying many of the suggested methods I have come to a point where I would like to have an expert's advice if the methods applied on ...
1
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1answer
46 views

How to standardize count data for different sampling site sizes

I want to do a linear regression for my data but I’m not sure what I need to do with my raw data before running a linear regression. I have counts for species in several forests of differing sizes. I ...
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votes
1answer
50 views

Difference in Quantile and cumulative percentage

How would you differentiate between the quantile function and cumulative percentage below? Note the treatment of numerics as categorical when grouping is performed. When would you use one over the ...
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0answers
26 views

Interpretation of the phrase “percent reduction relative to”

In the book Freakonomics, the following phrases appear: "From 1960 to 1985, the number of police officers fell 50 percent relative to the number of crimes. I interpret the above to mean that $$ r_{...
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1answer
52 views

Regression with frequency rating in percent as dv

I seem to have a similar issue as asked in this thread, nevertheless I'm still clueless about what model I have to fit to my data. I conducted a repeated measure experiment (consisting of 2 sessions) ...
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0answers
2k views

will a correlation between a percentage variable and a numerical variable work? [duplicate]

I am trying to conduct a simple correlation analysis between a group of variable, however I have a number of these variables in percentage change (or percentage yield) form and the others in strictly ...
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0answers
49 views

how to compare groups and percentages within

I am new to statistics and would really appreciate help. The people within the groups are different - how do I compare the percentages to see if there is a statistical significance between the groups ...
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0answers
33 views

T-test for “discrete” variable

In my dataset, I have 2 columns. Both of them are a percentage. However, they only take the following values : (0,10,20,30,40,50,60,70,80,90,100). I would like to know if I could do a t-test on those ...
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1answer
18 views

How to report percentage change in proportions?

I want to compare changes in the proportion of fruit purchases over time for a household. For example, in year 1, 4/40 (10%) fruit were apples, in year 2, 12/80 (15%) fruit were apples. When ...
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0answers
46 views

How to calculate return when initial value is negative?

Let's say the initial value is A, and A is negative (A<0). The final value is B, which is positive (B>0). I know I can not use log returns, since A is negative So, if I want to calculate the ...
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0answers
34 views

Can the null and alternative hypotheses be percentages?

Say you've been asked to discover if data supports the assertion that more than 50% of participants in a study did whatever the study is trying to find. In determining the null and alternative ...
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3answers
15k views

Should percentages be reported with decimal places?

When presenting data using a percentage, is it a good thing to have decimal places, say 2 decimal places instead of rounding off to whole numbers? For example, instead of 23.43%, you round off to 23%....
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1answer
497 views

Best way to analyse percentage data

I have percentage data and would like to see if these different variables have an affect on certain factors; i.e., I have different habitats of an area e.g., improved grassland: 40%, arable: 15%, ...
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1answer
176 views

Persistent Cluster ID's for DBSCAN

When executing the DBSCAN algorithm over multiple runs on similar data (but not the same), I would like to generate persistent ID's so we can monitor how the clusters changed over time. Selection of ...
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1answer
67 views

Interpretation of variable in a probit model

I am struggling interpreting the coefficient of a variable which is expressed as a proportion in a probit model. As it currently stands , I am interpreting the average partial effects of this variable ...
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0answers
13 views

Comparing percentiles of datasets of varying sizes

I am trying to build a simple anomaly detection solution. I have a dataset with normal observations. It has about a 100 values. I calculate the ...
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0answers
19 views

Need help finding correlation between output and tax rate? - Best method to do so

I am currently doing a study on the impact of a change in agriculture taxes on agriculture output. I want to compare output (volume in $) data for years 2013-2014-2015-2016-2017 in different crop ...
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1answer
246 views

Hypothesis test for summary data involving percentages

500 patients had an operation to remove stomach cancer. There exists a clinical guideline that suggests that a minimum of ten lymph nodes should be removed during the operation. I am therefore ...
2
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0answers
66 views

Statistical significance of percentage difference for a poll question with multiple options?

The question is: how to calculate the statistical significance of difference between percentages in the case described below? Suppose we have a poll question with $n$ answer options $A_1, …, A_n$, ...
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0answers
8 views

Should I use weights in calculating the Coefficient of Variation for transformed proportions?

I have percentages of people having an event for 21 regions. Since I want to calculate a Coefficient of Variation, I took the arcsine of the proportions to normalize data. The problem is: every region ...
0
votes
1answer
761 views

Calculate the percentile from a T-score

Is it possible to calculate the percentile from a T-score? If yes, what formula can be used for it, and what other variables (e.g. standard deviation, degrees of freedom, etc.) are needed for it?