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
- study on how to collect, organize, analyze and interpret numerical information
- sicence of uncertainity and extracting data
- statistics help us to make decissions
- used to study population
- we work with a sample, because the population is to large
- its about working with population and samples
- ↑ This is How Easy It Is to Lie With Statistics - YouTube. www.youtube.com [online]. [cit. 2021-01-07]. Dostupné online.