Uživatel:Juandev/Statistics

  • good explanation of mean (=avaradge), median and mode
  • bad use and interpretation of statistics leads to bad claims
    • due to this people where even accused falsly from murder in the past[1]
  • in hypothesis testing we never "prove" data
  • small numbers may have hight error, on the other side more data help with the prediction
  • qualitative data?

Errors editovat

  • observational or meassurement error
  • in statistics its not a mistake, rather something we should count

two types of errors

  • random - may vary from observation to another; caused by unintended mistakes by respondents, interviewers
  • systematic (=statistical bias) - occurs when we use intruments the same way with the same place; caused by the bad set of questionaiire
    • Multitrait-multimethod matrix helps on decission, weather the questionaire is set right

What is an index in science? editovat

    • known as composite indicators
    • index number shows the percentage changes from the base year
    • its a term from statistics
    • its always about division and changes in time, but some indices does not have that. If they are true indeces they have these features in their development history - from what and how they were developed. Eg.:
      • Uses Totaled is a sum of x, its a part of Relative Cultural Important Index, which might be related to Relative Importance Index, which has division = (RFCs + RNUs)/2

Poznámky k Statistics - A Full University Course on Data Science Basics editovat

  • study on how to collect, organize, analyze and interpret numerical information
  • sicence of uncertainity and extracting data
  • statistics help us to make decissions

Poznámky k Statistics Course for Beginners: Introduction to Statistics editovat

  • used to study population
  • we work with a sample, because the population is to large
  • its about working with population and samples
  1. This is How Easy It Is to Lie With Statistics - YouTube. www.youtube.com [online]. [cit. 2021-01-07]. Dostupné online.