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Discuss the necessity of both the mean and the standard deviation to adequately describe the data...

Discuss the necessity of both the mean and the standard deviation to adequately describe the data in light of what you know about normal distributions and standard z values.

math   Statistics-And-Probability   
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Answer #1

X ~ ŅĢı = 0.σ2-1) is standard normal and for any other valuesexcept μ-0 and σ2-1 will be the case of normal distribution

A necessity if the sample size is large enough then by CLT we can approximate the sample as a Normally distributed assuming

the distribution is fulfilling the other requirements. it makes calculation easy for most of these cases

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