Questions tagged [percentage]

Number or ratio expressed as a portion of 100

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55 views

Comparing proportions: Is this data able to justify the statement “the more educated you are, the more likely you are to be unemployed”?

Hopefully they can help me, I have a question regarding: http://www.oecd.org/edu/Mexico-EAG2014-Country-Note.pdf The table on page 12 shows the percentages of unemployment by level of education ...
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1answer
75 views

Are these percentages calculated right for comparing two groups' attitudes?

I'm interpreting results of a research I'm working on and I think the percentages are calculated falsely. I'd like to make sure that everything is correct. the research is about comparing two groups' ...
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1answer
28k views

SPSS - making percentage variables

I need to transform a fairly large data set in order to analyse a certain variable as a percentage. I have seconds that I want to convert to their percentage value but by grouping variables. ie. Age/...
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1answer
18 views

R survey sackage method for replicating SUDAAN proc crosstabs SEROW [closed]

I have been using SUDAAN's proc crosstabs to generated weighted crosstabs, percentages, and standard errors for counts and percentages. I'm trying to replicate this functionality in R and have gotten ...
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1answer
68 views

which regression to use when response variable is in percentage [duplicate]

Hello I am working on a regression problem with a data set where my predictor variables are in the multiples of 10,000 however my response variable is in percentages. I tried to fit a linear ...
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1answer
34 views

How do I calculate relative proportion of a fraction with respect to total value?

I have several curves in one graph (see fig.). There are 5 discernible segments within each curve that are individual slopes. Within each "x-coordinate segment" there are five samples with their ...
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1answer
72 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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1answer
55 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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1answer
280 views

Machine Learning model with aggregated data as training

I would like to predict a LABEL: A,B or C using a classification machine learning model. My data to train the model is like: ...
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1answer
34 views

Statistical difference between multiple groups using percentage data

I have 3 groups of data. Group 1 contains 11 values, group 2 contains 7 and group 3 contains 11 values. The values are in the form of 'percentage change over time'. I would like to test to see if the ...
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1answer
118 views

Combine two different probabilities

I'm not sure how to best phrase this, but I'm not sure how to combine two probabilities (or if that even makes sense). Example: Assume that 5% percent of the population has a particular gene is 20 ...
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1answer
44 views

Confusion between percentage and percentage point

I am struggling to interpret a interaction term. A 1% point increase in military expenditure growth, leads to a X% point change in GDP growth. what is a 1% point increase in military expenditure ...
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1answer
570 views

Calculating % change between two z-scores - correct?

just a quick question I was a little unsure about. Any thoughts much appreciated! Say I am running an 2 condition experimental trial where one of the outcomes is a z-score (e.g. cognitive test ...
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1answer
433 views

How to compare paired percentages (can I use the Wilcoxon signed-rank test?)

Imagine I would like to test whether the blood oxygen saturation differs significantly between left and right arm. Now, imagine that: All measurements are percentages The differences between pairs ...
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1answer
34 views

Explaining a change in percentage from one year to the next

I recently read this sentence: 'Only 2.31% of all flats were vacant, a reduction of 27%'. Elsewhere in the publication (a page or so later) there was a graph showing that the previous year’s ...
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1answer
218 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
44 views

What is the official/formal term for a “population share”?

I am not a statistician but I plan on using the appropriate term to indicate the "percentage share" of a city's population to the total population of its state. Example: ...
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1answer
36 views

Maximum possible percentage above a sample mean

I was reading an article the other day about how 90% of people think of themselves as "above average" in terms of intelligence. Assuming that by average they are referring to arithmetic mean, what ...
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1answer
70 views

How to Quantify Likelihood

We are given two normal populations A & B with means $\mu_1$, $\mu_2$ and standard deviations of $\sigma_1$, $\sigma_2$ respectively, as well as a subject X. Our purpose is to determine which ...
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1answer
818 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?
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1answer
431 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: ...
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1answer
83 views

“Weighted” Percentages

I have data that looks like ...
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1answer
114 views

How to standarise percent values 0 - 100%

I'm working on dataset that contains a variable from 0 to 1 (0 - 100%). Distribution of the variable differs depending on the context (defined by another variable). Depending on the context the ...
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1answer
50 views

How can I describe various intermediary results of a percentage change calculation?

Lets say world happiness increases by 10%. In one form of the calculation, I wind up with .1 and then I multiply that by 100 to get 10%. In another form of the calculation, I wind up with 1.1, ...
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2answers
1k views

Can I run a normality test on percentages?

First I'll start out with some background information. I conducted image analysis on 200 images to identify the area % of 7 different phases. I then averaged the results from each of for the 200 ...
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2answers
125 views

Calculating average percentage from a set of pair percentages

I have a series of 7 pairs with each pair adding up to 100%. I now need to average column a and b to end up with a final pair totalling 100%. Where do I start? ...
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1answer
121 views

transforming exchange rate and inflation rate

I am testing some variables in percentage (exchange rate, inflation, and GDP growth rate), and I am a bit hesitate whether it is better leave them as percentage or transform them into log values. ...
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2answers
1k views

Proper Statistical Test for Binary Data

I looking for the best statistical test to apply in a particular situation and I hope I can find here the answer(s) I'm looking for. First of all some details: I'm studying 33 different mutants of a ...
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1answer
18 views

Two formulas giving slightly different output

I am struggling to find a proper explanation why the two methods that I use for finding the difference in EXCEL are giving me two slightly different numbers. The idea behind the task is that we have ...
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0answers
18 views

weighing percentage changes by number of samples

Applying one simple formula for percentage change. This: 100 * (8 - 2) / 2 = 300% gives the same results as this: ...
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0answers
6 views

How to determine the percentage difference between two quantities associated with uncertainty measure

Say I have two quantities 10 ± 2 and 12 ± 3 (uncertainty is standard error). How do I determine the percentage difference between them? Or should I determine it at all (There is no meaning to do it in ...
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16 views

Proper analysis procedure of paired rate comparisons - ratio or difference?

I have a set of population counts where each row represents a different region, and variables show overall counts and counts/percentages within specific groups/criteria. I am interested in the cross-...
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34 views

Two way ANOVA with percent change

I have two groups of animals: "active cycle" and "inactive cycle". Within each group, there are two groups: "control" and "treated". I measured the levels of a specific receptor for each animal in ...
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1answer
36 views

Comparing percentages with unequal sample sizes

I've spent some time collecting participation data on a schools competition. To sum it up: Roughly speaking 1000 schools take part in the initiative every year. Only 10 schools become finalists. ...
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29 views

How to interpret coefficient when the dependent variable is a percentage change?

I am having some trouble interpreting my regression output. My model is LN of transaction volume = alpha + $\beta_1$_RER + control variables RER is defined as the change in the average exchange rate ...
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9 views

Appropriate analysis for univariate proportion data and environmental variables

I'm new to statistics so am trying to choose the best analysis to find if; There is a difference between canopy cover (0-100%) at different sites There is a relationship between canopy cover and ...
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9 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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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 ...
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0answers
17 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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23 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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1answer
61 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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13 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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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
38 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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20 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
20 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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27 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
159 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
11 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 ...