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Pub Health
Biostats
Question | Answer |
---|---|
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) |