Statistics Flashcards
When should you use spearman’s rank correlation
if you want to know if there is an association between different measurements from the same sample
When should you use chi squared test
When you have counted the number of individuals in two or more categories
When should you use standard deviation
When you want to look at the spread of data about the mean
When should you use paired t-test
If the data sets paired so that two measurements are collected from the same individual
When should you use unpaired t-test
When the data sets paired so that two measurements are collected from different individuals
Formula for percentage change
New quantity - original quantity X100
/ original quantity
Formula for % yield
Actual amount/ theoretical amount X100
Formula for % error (uncertainty)
2x absolute uncertainty X100
/ quantity measured
Formula for genetic biodiversity - proportion of polymorphic gene loci =
Proportion of polymorphic gene loci = number of polymorphic gene loci/ total number of loci
Formula for cardiac output
Cardiac output = heart rate x stroke volume
Formula for respiratory quotient
CO2 produced / O2 consumed
Formula for microorganism population growth
N = N0 x2^n
Formula for Efficiency of biomass transfers
= biomass transferred/ biomass intake X100
Temperature coefficient (Q10) formula
Q10 = R2/R1
