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Pub Health

Biostats

QuestionAnswer
What is the interquartile range The difference in values between the 25th and 75th percentiles
variance sum of the squared deviations from the mean divided by the number of observations minus 1
Standard deviation Square root of variance
1 standard deviation above and below mean represents 68% of observations
2 Standard deviation above and below mean represents 95.4 observations
Z values useful for determining how extreme (how many standard deviations above or below the mean) and observed result is
deductive reasoning proceeds general to specific
Inductive reasoning proceeds specific to general
T_Test Determines whether observed differences between two sets of data are statistically significant (rather that caused by chance alone)
Created by: togini
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