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
• 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

• 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?

• • 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

• 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

• used to study population
• we work with a sample, because the population is to large
• its about working with population and samples