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Biostatistics: Lecture 7 (Confidence Interval Intro)

  1. this is process of drawing conclusions about an underlying population based on a sample or subset of the data
    statistical inference
  2. what are the two major areas of statistical inference
    estimation and hypothesis testing
  3. this refers to estimating unknown population characteristics like the mean or proportion
    estimation
  4. this refers to accepting or rejecting a statement regarding a population characteristics
    hypothesis testing
  5. what is the difference of hypothesis testing and estimation
    with estimation, no value of the parameter is assumed before the sample is collected while in hypothesis testing, a parameter value is designated or hypothesized before the collection of the sample data
  6. what are the two types of estimates
    point estimate and interval estimate
  7. this is a type of estimate which refers to a numerical value  computed from the data contained in a sample
    point estimate
  8. this is a procedure or a rule that tells how an estimate is computed based on the measurements contained in a sample; usually expressed as a mathematical formula
    estimator
  9. this is a type of estimate that we are willing to say with some degree of certainty, contains the parameter being estimated.
    interval estimate
  10. this refers to the degree of certainty in interval estimate
    level of confidence or confidence coefficient
  11. the level of confidence or confidence coefficient is denoted by
    1-α
  12. this consists of a single value of a statistic used as the best conjecture as to what the corresponding population value or parameter may be
    point estimate
  13. this refers to the bounds of confidence intervals
    confidence limits
  14. two-sided confidence interval
    • point estimate ± (critical value) × (standard error)
    • θ ± d
  15. the margin of error can be reduced if:
    -the sample standard deviation is          
    -the sample size is           
    -the confidence level is           
    • -the sample standard deviation is lower
    • -the sample size is increased
    • -the confidence level is decreased
Author
aisbear
ID
364695
Card Set
Biostatistics: Lecture 7 (Confidence Interval Intro)
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