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Descriptive statistics
- used for describing the pic of your data
- determining whether data are normally distributed
- describing the relationship with clinical normality
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inferential statistics
- used for making inferences about a characteristic or a value based on a sample
- used to draw conclusions about a population by using a sample
- hypothesis testing:
- used to test an assumption or ascertain a "truth" about a population using a sample and some test statistics
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Large sample sizes are ____ measurements or patients
Small sample sizes are ___
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parameters
numerical descriptive measures of a population
p for p
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statistics
numerical descriptive measures of a sample
s for s
- cannot calculate parameters, but can calc statistics to estimate population parameters
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POINT estimation
- a single value (p or mean) to estimate the paramter of interest
- "p" proportion of a population with a condition, dz, or characteristic based on the proportion in the sample
- mean value: x bar of a clinical test, biological measure, or characteristic based on the mean value in the sample
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INTERVAL estimation
compute 2 numbers from sample data and use interval formed by two #s as an interval estimate of the parameter of interest
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the ______ proportion "p" is an estimate of the _____ proportion "pi"
- sample proportion
- population proportion
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