Statistics Flashcards
What is a population?
Whole set of items that are of interest
What is a census?
Observes every member of the population
What is a sample?
Selection of observations taken from a subset of the population
What is the formula for coding?
y= (x-a)/b
What is the mean of a coded sample?
mean of y= (mean of x - a)/b
What is the standard deviation of a coded sample?
sd of coded data= sd of original data/ b
What is required for a binomial distribution?
-fixed number of trials
-two possible outcomes
-fixed probability of success
-trials are independent of each other
What are the UK weather stations in order of furthest north to south?
Leuchars, Leeming, Heathrow, Hurn, Camborne
What are the international weather stations?
Beijing, Jacksonville, Perth
What are amounts less than 0.05mm of rainfall recorded as?
Tr or trace
What is daily total sunshine recorded to?
The nearest tenth of an hour
What is daily mean wind direction and wind speed measured in?
Knots, and wind directions are given as bearings and cardinal directions
What scale categorises mean wind speed?
Beaufort scale
What is a knot in mph?
1 kn= 1.15 mph
What is daily maximum gust measured in?
Knots
