Chi-squared Flashcards
1
Q
tests for
A
differences in categories
2
Q
null hypothesis
A
there is no bed load size difference at site 1 and site 8
3
Q
alternative hypothesist
A
there is a difference in bed load size at site 1 and site 8
4
Q
method
A
- generate null and alternative hypothesis
- calculate the even or equal distribution using formula
- compare data and observe if it looks significantly different or random than expected
- take the expected value from the observed and use formula
- the higher the value of chi squared, the greater the difference
5
Q
required sample size
A
must be grouped into categories
6
Q
advantages
A
deals with data in frequencies
has precise numerical values
7
Q
disadvantages
A
- lengthy calculation
- prone to human error from data collection
8
Q
findings from sabden
A
99.9% sure bedload decreased for a reason and not by chance
