Important ideas from Chapter 5: - PowerPoint PPT Presentation

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Important ideas from Chapter 5:

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is usually always computed when n is large and has approximately a ... When sampling measurements, the sample mean Xbar is used to estimate the ... – PowerPoint PPT presentation

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Title: Important ideas from Chapter 5:


1
  • Important ideas from Chapter 5
  • If X satisfies the 4 items in the binomial
    setting then
  • is B(n,p)
  • For large n, the distribution of X can be
    approximated by a
  • N(np, sqrt(np(1-p))) distribution
  • is usually always computed when n is large and
    has approximately a
  • N(p, sqrt(p(1-p)/n)) distribution.
  • When sampling measurements, the sample mean Xbar
    is used to estimate the population mean m and
    for large n Xbar has approximately a N(m ,
    s/sqrt(n) ) distribution. If the population is
    normal, then the sample mean will be normal
    (exactly)
  • Confidence intervals Always of the form
    estimate /- MOE
  • The MOE is computed as a tabulated value
    times the standard deviation of the estimator
    for now, the tabulated values are all from Table
    A. Understand the following slide...!

2
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