Search results

  1. D

    Using the Anderson-Darling test for normality instead of the Shapiro-Wilk

    Thanks for your reply! :) I tested the normality of my data because I wanted to know whether to calculate mean and standard deviation or median, Q25 and Q75, While my data is not normal, I used the second option (median and quantiles), not only for creating a table but also to represent...
  2. D

    Using the Anderson-Darling test for normality instead of the Shapiro-Wilk

    I have to test the normality of my data in R but I'm not sure if the Anderson-Darling test does the same as the Shapiro-Wilk one (the number of observations is too high, more than 50000, so the Shapiro-Wilk test cannot be used). I've read about this test, which constitutes a variant of the...
  3. D

    Non-normal data, non-parametric tests for normality, and determination of statistical parameters

    You're right, I have decomposed this histogram of temperatures by seasons (the figure I posted shows the distribution of the annual values of temperature). The problem is that I have to determine mean and sd or median and median absolute deviation for this histogram, and I don't know which will...
  4. D

    Non-normal data, non-parametric tests for normality, and determination of statistical parameters

    Hi, I have a database with more than 50000 observations. I have applied non-parametric tests to determine the normality of the data but in any case p<0.05, rejecting the null hypothesis of normality (in many cases, graphically, the histograms appear to follow a bimodal distribution). However...