data analysis

  1. L

    Need Help with Data for Regression

    Hi, I am working on a replication of a research paper where I have to compile my own data to copy the regression done in the research paper. I have never done a regression like this before and I am not sure about the data I chose - I would appreciate any help and input. All the variables I...
  2. R

    Statistical analysis of scientific data

    Dear All, Hi, I am doing PhD in the field of material science. I want to know what kind of statistical method I can apply to interpret results of my experiment. Suppose, I have 30 samples and there are about 15 properties associated with each of these samples. With this post, I want to attach...
  3. W

    Survey Data Analysis

    Hello, I am interpreting some data that was calculated by someone else and initially I was confused how this person got these numbers. So I emailed the office that oversees the analysis of this information and their explanation still left me a little confused. Hopefully someone can clarify...
  4. M

    Factor Analysis (categorical variables)

    Hi everyone, I need to run a factor analysis on a few nominal variables. They have no defined order, therefore, I cannot use polychoric correlations to create a matrix. My variables are coded such that: 1- respondent 2- husband 3- In laws and so on. I have eight variables and will...
  5. P

    Calculating representative value for data

    Assume there are ten data with values a_1, a_2, ..., a_10 each with different non-symmetric errors. The problem confronting me in brief is, to combine the 10 results a_i and their associated non-symmetric errors according to some acceptable precept so as to determine the value of a and its...
  6. D

    vibration signal_prediction

    Hello, I have a vibration data coming from a motor. i am using R program to do the predictive analysis. My vibration data is a white noise (mean and variance are constant). I need to use this vibration data to do the prediction. How do i use this signal for prediction? Do i need to do some...
  7. R

    Problem with normalization and - proteomics analysis (LC-MS)

    Hi folks, I am working with proteomics data, containing mainly LC-MS and NMRI analysis. Firstly, I must normalise data to give valuable compound for biostatistics analysis such as data imputation. I have never had to deal with such data. Can you advise me on which method to choose (I usually...
  8. E

    How should i use this dataset?

    Hi all! I'm trying to figure out which way I should deal with my data I have data sampled from 2 "general areas" on opposite sides of the country. in these general areas there are roughly 50 trakts placed (in a grid, random staring point) A trakt contain 16 sample plots. Trakts have been...
  9. B

    Anova with data reduction? (Experimental design)

    Hi, this is my first post, I hope to do nothing wrong like posting in the wrong area.:pag It happens that I did an experiment where I have a control group and an experimental one, I am comparing means with ANOVA, and I want to reduce the data by eliminating 5% of the lower and higher data...
  10. S

    Analysis of data - how to find the most relevant factors

    Solved. Sorry... You can delete it.
  11. P

    Data input- ordered logistic regression

    Hello, I am trying to analyze the relationship between mode familiarity and Technology & demographic characteristics. So I have an ordinal dependent variable and binary, ordinal, continuous and nominal variable as independent variables. My output variable is the familiarity of mode: very...
  12. W

    Multinomial logistic regression

    Hi, I'm quite new to R and I need a little advise on whether multinomial logistic regression is right for what I'm hoping to do for my data. Basically, I've been given some camera trap data to work with. The data is non-normal and consists of 25 species documented over 30 different trap...
  13. E

    How to compare increase in price from different samples?

    I have data samples of home sales of N different cities, and I want to find the city with the biggest increase in average prices between 2012 and 2015. How could I compare these cities while taking into account the difference in number of transactions? City 1 Sample: Year, Average...
  14. C

    Analyzing Sleep and Productivity Data

    You are given data that stores the hours that an individual slept every night between the data's start and end points. You are also given the individual's task lists for each day between the data's start and end points (the tasks that were completed are checked off). What logic could be used...
  15. D

    Which statistical test should be used?

    Take a quiz and refresh your knowledge in selecting the appropriate statistical test/procedure to answer a given research question. This assessment (25 MCQ+ brief demographic questionnaire) is designed for graduate students in social and behavioral sciences and developed as a component of a...
  16. J

    Reading dataset stored in vector form in R

    I am new to R how can I read a dataset stored as vectors and with comments in it into R? See Attached. Thanks in advance.
  17. N

    Compound poisson gamma model and biomass data

    I have some biomass data (total count -discrete- of individuals and total dry weight -continuous-) that I would like to model with environmental parameters recorded at different spatial scales (temperature -continuous-). My biomass data is zero inflated mainly due to scale inaccuracy and as a...
  18. C

    Methods and Data Analysis for Experimental Study Design

    Good day! I am working on my methods section for my dissertation proposal and want to ensure I am thinking through my methods and data analysis correctly and using the appropriate statistical tests. I plan to collect data this fall. Thank you! Purpose Statement This purpose of this...
  19. P

    Learning analytics

    Hi all. I am a newbie to data analysis. I am an online learning facilitator for an online seminar-based program for local high school students. Since it is a 100% online program, there are no face-to-face sessions. They have to complete online short quizzes (1 question per quiz, 2 to 3 quizzes...
  20. T

    What is the best way to determine the convergence of data?

    I'm doing some research with Matlab (materials science related), and a lot of my work involves statistical analysis, of which I'm not super familiar with (so I apologize in advance if I'm not using proper terminology). For this project I'm measuring some data, and I want to come up with a way to...