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Title:

NORMAL DISTRIBUTION

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NORMAL DISTRIBUTION NORMAL DISTRIBUTION Normal distribution is the name given to a type of data distribution that has the following characteristics: results from ... – PowerPoint PPT presentation

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Date added: 29 October 2018
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Title: NORMAL DISTRIBUTION


1
NORMAL DISTRIBUTION
2
NORMAL DISTRIBUTION
  • Normal distribution is the name given to a type
    of data distribution that has the following
    characteristics
  • results from large, random data sets
  • the majority of data is in the middle of the set
  • the data is distributed symmetrically around the
    middle and thus results in a symmetrical
    histogram
  • the frequency polygon forms a Bell shaped curve
    called the Bell curve or the Normal curve

3
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4
NORMAL DISTRIBUTION
  • the averages (mean, median, mode) are the same or
    close to each other and fall in the middle of the
    set
  • there are few outliers
  • approximately 68 of the data falls within 1
    standard deviation of the mean and approximately
    95 within 2 standard deviations
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