Statistics Flashcards
Descriptive stats
organising, summarising and describing data
variables can either be on scale of.
Discrete to continuous. organismic to environmental.
discrete variable
variable that can only take one category
continuous variable
variables that can take any point on a scale
Organismic variable
variables that relate to humans
environmental variable
LoM
Level of measurment
nominal data
about identity, categories, list, one category or another
ordinal data
nominal data which can be orders or put in a series without interval
interval data
ordinal data with intervals in series
ratio data
where there is an absolute zero possible in data so a ratio between data can be found
Systeme internatioonale
international system of units
System internatioonale units
seconds, meters, kilograms, amps, kelvin, cd, mole
how to record systematic international units
lower case, non italicised, non plural, space between number and unit
Features of normal distribution curve
asymptotic(never reaches 0), symmetrical, naturally occuring
point on a normal distribution where cure goes from convex to concave
standard deviation
Adavntages of mode
resistant to outliers, can be used for any level of measure
disadvantages of mode
sub groups can have great affect. Is a terminal statstic
advantages of median
not affected greatly by outliers. can be used for most levels o measure
disadvantages of median
ignores values just takes rank into account
advantages of mean
takes into account value. weighted mean can be takes
disadvantages of mean
only used in interval and ratio data. requires normal distribution
Kurrtosis
how in favour of the mean a normal distribution curve it
mesokurtic
normal distribution
