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When its probability distribution the standard normal distribution.

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Q: When can you say the distribution is considered normal?
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Is normal distribution hypothetical?

The normal distribution is a theory, which works in practice (with a large enough sample). E.g if you were to plot the height of everyone in the country, you should end up with a normal distribution. Hence it is not usually considered hypothetical, in the same way that, say, imaginary numbers are hypothetical.

What is the perfect standard normal distribution?

The standard normal distribution is a subset of a normal distribution. It has the properties of mean equal to zero and a standard deviation equal to one. There is only one standard normal distribution and no others so it could be considered the "perfect" one.

What does it mean when you say a variable is normally distributed?

It means that the probability distribution function of the variable is the Gaussian or normal distribution.

What is the difference between a normal distribution and the standard normal distribution?

The standard normal distribution is a normal distribution with mean 0 and variance 1.

What is the difference of a normal distribution and a stardard normal distribution?

The standard normal distribution is a special case of the normal distribution. The standard normal has mean 0 and variance 1.

Is continuous distribution normal distribution?

le standard normal distribution is a normal distribution who has mean 0 and variance 1

What proportion of subjects are considered outliers in a normal distribution?

There is no specific proportion: the answer depends on the level of significance beyond which subjects are considered to be outliers.

Does a normal probability distribution include a bimodal distribution?

No, the normal distribution is strictly unimodal.

Is the normal distribution infinite?

The domain of the normal distribution is infinite.

Is normal distribution also a probability distribution?

Yes. When we refer to the normal distribution, we are referring to a probability distribution. When we specify the equation of a continuous distribution, such as the normal distribution, we refer to the equation as a probability density function.

What is symmetrical normal distribution?

The Normal distribution is, by definition, symmetric. There is no other kind of Normal distribution, so the adjective is not used.

How does standard normal distribution differ from normal distribution?

The standard normal distribution has a mean of 0 and a standard deviation of 1.