Biostats

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Author:
JVu
ID:
132087
Filename:
Biostats
Updated:
2012-01-31 20:01:26
Tags:
M2 scco
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Description:
M2
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  1. Descriptive statistics
    • used for describing the pic of your data
    • determining whether data are normally distributed
    • describing the relationship with clinical normality
  2. 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
  3. Large sample sizes are ____ measurements or patients
    Small sample sizes are ___
    • large > 30
    • small < 30
  4. parameters
    numerical descriptive measures of a population

    p for p
  5. statistics
    numerical descriptive measures of a sample

    s for s

    • cannot calculate parameters, but can calc statistics to estimate population parameters
  6. 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
  7. INTERVAL estimation
    compute 2 numbers from sample data and use interval formed by two #s as an interval estimate of the parameter of interest
  8. the ______ proportion "p" is an estimate of the _____ proportion "pi"
    • sample proportion
    • population proportion

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