Statistics

9 cards

statistics for primary FRCA

Created Dec 14, 2010
by
007wendy

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 Side A Side B 1 What does standard error of the mean actually mean? An estimate of the spread (standard deviation) of sample means around the true population mean 2 arithmetic mean vs geometric mean arithmetic mean = what u know as mean, geometric is square root of the combined product of... 3 What does relative risk mean? A way of expressing whether you're more or less likely to have an outcome e.g. disease if you... 4 What does odds mean? An expression of having X divided by not having X. The resulting number is not intuitive like... 5 What is the odds ratio? The ratio of odds of having the disease with exposure divided by the odds of having the disease... 6 meaning of sensitivity: no. of positive test results that actually have disease/total no that actually have disease 7 meaning of specificity no of correctly identified negative results/total no that are actually healthy 8 positive predictive value no. of correctly identified positives/total number with a positive outcome 9 negative predictive value no. of correctly identified negatives/total number with a negative outcome