Normal Distribution, Confidence Intervals for the Mean, and Sample Size
Continuous Probabilities:
Normal Distribution, Confidence
Intervals for the Mean, and Sample Size
The Normal Distribution
Normal (Gaussian) distribution: a symmetric distribution, shaped
like a bell, that is completely described by its mean and standard
deviation.
Mean or
x
Tail
Every distribution has 2 tails.
Standard Deviation or sd
? There are an infinite number of normal curves.
? To be useful, the normal curve is standardized to a mean
of 0 and a standard deviation of 1.
? This is called a standard normal curve.
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