# Tagged Questions

2answers
93 views

### Do skewness and kurtosis uniquely determine type of distribution?

Inspired by this answer, I have following question: Is it enough to know just skewness and kurtosis in order to determine distribution that data comes from? Is there any theorem that implies this? ...
1answer
99 views

### How do I test for a symmetric distribution?

I collect numbers from generators that yield different ranges of whole numbers with an unknown distribution. I want to estimate the mean of the numbers outputted by this generator. I'm convinced the ...
1answer
88 views

### Cluster analysis with skewed distibutions

For my master's thesis I would like to use different clustering algorithms to cluster municipalities (as objects) in regard to their land-use characteristics (as variables). Analyzing my data ...
0answers
118 views

### Gigantic kurtosis?

I am doing some descriptive statistics of daily returns on stock indexes. I.e. if $P_1$ and $P_2$ are the levels of the index on day 1 and day 2, respectively, then $log_e (\frac{P_2}{P_1})$ is the ...
1answer
113 views

### Eigen-vectors and skewness

I'm doing some experiments to assess the extend to which MV skewed distributions can affect eigen-vectors (and more specifically Deming regressions). Suppose $X=(x_i,...,x_n')$ with \$x_i \in ...
0answers
113 views

### How to deal with a variable that ranges from 0 to 1 and the distribution has two spikes at these values with normal-like distribution in the middle.

I have the following setting (& would like to pick a model/or transformation that can help): dv is normally distributed continuous variable, all IVs are continuous, but one of them is the above ...
1answer
399 views

### Is Hansen's skewed-$t$ distribution the same as the skewed-$t$ distribution which is a special case of GH Distribution?

I recently studied two asymmetric t distribution both with a name of skewed-$t$. I am confused with their differences or are they actually the same? The first one is introduced by Hansen (1994) with ...
1answer
857 views

### How can I calculate cut-off points from a normal distribution?

I'm trying to calculate the upper percentage points for the 0.99 percentile for samples drawn from a normal distribution, with a sample size of 500. How can I calculate the expected values for ...
3answers
3k views

### Why is the arithmetic mean > median on a histogram skewed to the right?

I am fairly new to statistics. Currently I am into (histograms) medians, arithmetic mean and all the general basics. And I came accross the fact/rule that the arithmetic mean is (always) larger than ...
3answers
526 views

### Can somebody offer an example of a unimodal distribution which has a skewness of zero but which is not symmetrical?

In May 2010 Wikipedia user Mcorazao added a sentence to the skewness article that "A zero value indicates that the values are relatively evenly distributed on both sides of the mean, typically but not ...
0answers
1k views

### The effect of skewed continuous predictors in a binary logistic regression model

I am analyzing data with a binary outcome and a variety of continuous and categorical (including dichotomous) predictor variables. My approach is to perform a binary logistic regression and to treat ...
3answers
870 views

### Closed form formula for distribution function including skewness and kurtosis?

Is there such a formula? Given a set of data for which the mean, variance, skewness and kurtosis is known, or can be measured, is there a single formula which can be used to calculate the probability ...
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