skewed data

  1. P

    How to analyze extremly left-skewed data?

    Hey everyone, I am facing some trouble with the data of my master thesis and so I am looking for more general advice on how to deal with this topic: I am investigating between the % of family ownership in family firms and the acquisition stake (also in %). Therefore, I planned to use a Tobit...
  2. P

    Help analyzing nonnormal data

    Hi everybody, I'd like to perform an ANOVA or similar with data whose residuals are nonnormal. My dependent variable is 1-7, but about 30% of my respondents provided 1's and the plurality of the rest provided 2's. I've tried log and square root transformations with no luck. Any advice on how...
  3. S

    K-means cluster for skewed dataset

    Hi, I've 7 columns(variables) and their percentiles are shown as below for 14K rows. I've tried to create k-means clusters for 14k observations of 7 variables. A-G are products the numerics are turnover for A-G If you look at the table, massive dataset is having no turnover for all...
  4. rogojel

    Using bootstrap to calculate the sample size for a median ?

    hi, I have a small(ish) sample of 31 data points from a highly right skewed distribution and need to determine the sample size to estimate the median. My idea is to randomly select (with replacement) 10 data points and then estimate with the bootstrap the 0,025 and 0.975 percentiles and...
  5. V

    What test to compare bacterial growth in three areas with repeating variables?

    I have a dataset of number of bacterial colonies grown from 11 water samples taken from 3 different watersheds. I want to know if the land area, population, number of waste water treatment plant outfalls, and number of septic tanks in the watershed have any effect on the bacterial growth. The...
  6. K

    Skewed data - what test should I use

    Research question: Does wearing a helmet affect head repositioning error in a group of normal participants compared to not wearing a helmet? 3 trials were conducted for each variable (helmet on and helmet off) for each participant. The average of the 3 trials was calculated and converted from...