{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Cheat sheet biostat

# Cheat sheet biostat - o 68.3 1 SD o 95.4-2 SD o 99.7-3SD...

This preview shows pages 1–3. Sign up to view the full content.

Variable o Categorical Ordinal/ not ordinal o Quantitative Discrete/continuous Sample o Collection of persons or objects on which we measure 1 or more variables Sample size-n-# of persons or objects in sample Observational unit- type of the objects in the sample Skewed to right Skewed to left Boxplot Identifying Outliers Fences Lower : Q1-1.5*IQR anything before or after this is an outlier Upper Fence: Q3+1.5*IQR IQR- Q3-Q1 – encloses 50% of data Deviation Standard deviation Variance = S^2 Coefficient of Variation= standard deviation as a % = CV = s/y *100 o Smaller the % means more variation Empirical Rule (only applies to normal distribution)

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: o 68.3% +_ 1 SD o 95.4% +-2 SD o 99.7% +-3SD • asymmetry-skewness peakiness –kurtosis • estimate S by empirical rule • p- parameter- characteristic of a population µ and sigma • p^ - statistic – characteristic of sample y and s • Statistical inference: drawing conclusions from a population based on observations in a sample of that population. Representative sample • Random sample – a random n items is a n in which … o Every member of the population has the same chance of being included o The membrane of the sample are chosen independently of each other...
View Full Document

{[ snackBarMessage ]}

### Page1 / 3

Cheat sheet biostat - o 68.3 1 SD o 95.4-2 SD o 99.7-3SD...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online