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STTN Test 4

Ch 9-11

TermDefinition
Statistical interference Use sample data to gain info regarding population
Parameter Summarizing value calculated from whole population
Statistic Summarizing value created from sample
Sample mean (x-bar) & standard deviation (s) are Estimates of unknown population mean (mu) & standard deviation (sigma)
Point estimation Population parameter estimated from SINGLE NUMBER calculated from sample data
Interval estimation Population parameter lies between 2 values calculated from sample data with a degree of certainty/ confidence interval
Methods to estimate population parameters - Point estimation - Interval estimation - hypothesis testing
Point estimation for population mean (mu) x-bar
Point estimation for population variance (sigma squared) s squared
Point estimation for population proportion (pi) p-hat = x/n
Created by: CARA.FAURIE
 

 



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