Difference Between Kurtosis And Standard Deviation. Nov 09 2020 Kurtosis is the average of the standardized data raised to the fourth power. If you look closely from this figure you see that The uniform distribution and the normal distribution both with a variance of unity.
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Dec 07 2020 Platykurtosis. Nov 25 2020 Sample standard deviation s 185 The z-critical value for a 95 confidence level is 196 while a t-critical value for a 95 confidence interval with df 25-1 24 degrees of freedom is 20639. Specifically platykurtosis describes a distribution that has a negative excess kurtosis.
Kurtosis on the other hand refers to the pointedness of a peak in the distribution curve.
If you look closely from this figure you see that The uniform distribution and the normal distribution both with a variance of unity. Any standardized values that are less than 1 ie data within one standard deviation of the mean where the peak would be contribute virtually nothing to kurtosis since raising a number that is less than 1 to the fourth power makes it closer to zero. With the help of skewness one can identify the shape of the distribution of data. Specifically platykurtosis describes a distribution that has a negative excess kurtosis.
