statistical analysis

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    Statistical Analysis for Physics Research Project

    Important concepts for Problem: Chi-Square test, p-value, Sigma Significance I am an undergraduate Physics student working on a research project which involves a certain level of statistical analysis that I have some lacking knowledge about. I have built a macro that has the capability to...
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    Multiple comparisons problem

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    Big data analysis - What statistical method should I use?

    I am currently working on my master thesis that is investigating textual factors of "viral headlines". My professor gave me a data set for R that contains about 4.000 packages. Each package has about 3 -5 different headlines of the same article, and their resulting click rate. Somewhat like an...
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    What tests to carry out when all variables are categorical?

    Hello to one and all, I am doing a Research Project for my Master degree course. One of my Research Questions in my Project is: How do employees in <”name of country”> perceive the concept of <”an upcoming concept related to how employees work”> ? I need to take a survey in order to answer the...
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    Which statistical test to use

    Hi, I ran a pilot study and now that I have the data, I've become confused on how to analyze it. Participants were simply given a list of ~50 behaviours and asked to rate on a Likert scale (1-9): Permissibility for men: whether that behaviour is permissible (1) or impermissible (9) for a man to...
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    Is the linear mixed-effects model the right choice for analysing my data?

    I'm in desperate need of advice in terms of the choice of statistical test for my analysis. Briefly to explain what I am analyzing: I want to see the effect of 2 categorical variables ("genetic_profile" and "sex") and "age" variable (recorded in exact days which vary between subjects but the...
  7. R

    Looking for the appropriate stat test

    I am attempting to do a meta-analysis to understand a treatment effect . There are groups across many studies which have treatments A and B and a control group without any treatment. In other studies, there are groups with just treatment A and control groups. I am trying to understand what the...
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    What things to include in summary statistics?

    Hye! So this is a question being given: Now I am going to include the mean, median, mode, range, interquartile range. But what about graphs?? Should I make Histogram, Frequency Distribution Table, Box plot,Bar chart. Or should I just draw one of them?? Its a 15 marks...
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    Can an odd ratio be as low as <0.001?

    With a 95% CI of <0.001 to >999.999? Any idea what could be wrong? (Sorry about the french output, will gladly provide more info if needed) Thanks a lot!
  10. A

    Dummy Variable for repeated categories for the same observation

    Hello I am running a Random Forest and Decision Tree model and need to convert my categories into dummy variables since Python and its libraries are not able to hand categorical string data. Please refer to the attached Table: Of course I have other people in my dataset aswell and because of...
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    which test should i use for medical research

    Hei, I have done my experiments and now I have 5 control tests and10 different membranes to test with at least two samples each. (This is the row). And I have up to 50 different chemicals.(The column). The test it to see how much of the chemicals enter the membrane and which membrane works the...
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    Double or combined propbability

    Hi I am massively out of my depth here but wanted to know how you would work out something. I am looking at tennis statistics, 1st and second serve. if i have a player who on first serve loses 40% of them and on second serve loses 20% of them. what is the overall probability of them losing a...
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    Meta-analysis and longitudinal studies with baseline differences across two groups.

    I have a question on what meta-analysis is best when aggregating means using non-randomized longitudinal data with a control group that significantly differs from the active group at baseline. The outcome in question is depression, and the question is whether depression scores soar or fall in...
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    Statistical analysis in agriculture and agronomy

    Hello all members, I need your guidance about the analysis, as you are good at statistics. I explain my experimental design. Actually I inoculated 3 microorganisms (ASS-ASL and ASY using different concentrations i.e. 50-75 and 100ul/L). I wanted to check if these organisms at different...
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    Statistical analysis in agricultur and agronomy

    Hello all members, I need your guidance about the analysis, as you are good at statistics. I explain my experimental design. Actually I inoculated 3 microorganisms (ASS-ASL and ASY using different concentrations i.e. 50-75 and 100ul/L). I wanted to check if these organisms at different...
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    What test?

    Hi, It is 30 years since I did Stats 101, so I need a bit of help before I revisit Stats through LinkedIn Learning. I have attached an image on a spreadsheet whereby I have 10 leaders by 5 (A-E) variables, with the raw data and population proportion sample size. There is the REPORT which are...
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    Compare effect of different factors on one trait

    Hello everyone, I'm new here and I need some guidance. I'm trying to help my friend to write a paper for an exam. I have a little experience with ANOVA and using MSTAT, but not so much that I could figure out on my own what to do next. It's really a simple problem and I'm a little bit...
  18. R

    Which test to use?

    Hello I want to analyse some test score data from a group of students that was measured at two different time points. The results of the test are continuous. And I want to see whether the results improved compared to the first reading. I have a number of other variables that I want to control...
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    Fixing different demographics behaviour on survey data

    Currently collecting employment/working satisfaction data from survey at different countries. Same set of questions is used. I have come across that people from some countries tend to be more optimistic/pessimistic than others. How can I take their answering behaviour into consideration when...