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Hello, welcome to this lesson.
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In this lesson, we are looking at what following is true of a stationary time series.
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The first one, the process generating the data has a constant mean.
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The second one, the variability is non -constant over time.
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The third, the time series plots is a straight line.
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The last status called properties are dependent of time.
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So the status called properties are not dependent on time.
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The mean is not dependent on time.
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The mean is constant.
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The variance is constant.
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The covariance between two points that are the same...