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Unbiased statistic - PowerPoint PPT Presentation

Variability

Variability. Chapter 4 (part 2). Calculating Standard Deviation. First Step: Calculate the deviation from the mean Create a column for X- ? and calculate the value for each score. Second Step: Calculate the mean of the deviation scores M =?(X- ? )/N Third Step:

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189 views • 9 slides

Sampling Distributions and Forward Inference

Sampling Distributions and Forward Inference. By simulating the process of drawing random samples of size N from a population with a specific mean and variance, we can learn (a) how much error we can expect on average and

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166 views • 7 slides

SAMPLING DISTRIBUTIONS. SAMPLING VARIABILITY

SAMPLING DISTRIBUTIONS. SAMPLING VARIABILITY. COMMON NEED : estimate population parameters: mean or proportion or spread EXAMPLE . Producers of clothing need to know average dimensions of human body and their variability. Food industry needs to know average consumption of different foods, etc.

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373 views • 5 slides

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Unbiased statistic - PowerPoint PPT Presentation

Variability

Sampling Distributions and Forward Inference

SAMPLING DISTRIBUTIONS. SAMPLING VARIABILITY