Questions tagged [shape-parameter]

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What is the minimum of 2 Weibull distributions with the same shape parameter

If X and Y are two independent Weibull distributions with the same shape parameter, what distribution is the min(X, Y). I am trying to find out the hazard ratio for the following case. If I model Z=...
revathi ananthakrishnan's user avatar
2 votes
2 answers

How can I calculate the α and β parameters for a Beta distribution if I know the mean and 95% upper boundary I want the distribution to have? [duplicate]

As an input I have the mean (expected value) of a probability and the 95% upper bound. Now, I would like to define the α and β parameters for a Beta distribution such that I can do Monte Carlo ...
Lotte's user avatar
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Distribution Parameters for a GLM (Generalized Linear Models) evaluated at a point

I need help answering a problem I have: I am modeling data set using GLM that has two independent variables $x_1, x_2$, and a single response variable $y$. I am using $\verb|statsmodels.api|$ python ...
Ramiro Ramirez's user avatar
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2 answers

Finding shape and scale parameters of gamma distribution

I have a dataset [click here][1] and trying to find the shape and scale parameters of gamma distribution. ...
Lalantra's user avatar
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Mathematical Definition of Parameters

I am currently trying to differentiate the parameters in the beta generalized Gompertz distribution by Benkhelifa which has the following CDF and the following PDF with all parameters being larger ...
Natasha Davina's user avatar
4 votes
1 answer

Estimate parameters of an unknown negative binomial distribution based on known distribution

The PDF of a known NBD given in Equation (1). The parameter a and r are function of $μ$ = sample mean, and $s^2$ = sample variance, as given in Equation (2) and (3) respectively. $r$ = number of ...
vp_050's user avatar
  • 251
5 votes
1 answer

What is the shape of the Benini distribution?

The Benini distribution is a continuous univariate distribution that is used in actuarial applications. For all $x \geqslant \sigma$ it has density function: $$\text{Benini}(x| \alpha, \beta, \sigma)...
Ben's user avatar
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2 votes
1 answer

Is it possible to calculate the scale param θ for the Gamma distribution, given shape param K and a quantile value Q?

Stats-ophils, I am running into a problem, in which I'd like to generate a Gamma distribution (in Julia) and I know the value of the quantile Q(0.9) = 130 as well as the shape parameter k=2. Is it ...
dmeu's user avatar
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How can Pareto(alpha = 5, x_min = 2) be heavy-tailed where alpha is the shape parameter or the tail index?

Point 1 : It's known that, usually, when the tail-index (alpha) is between 0 and 2, of a certain data set, the distribution is considered as heavy-tailed. Point 2 : It's know that Pareto ...
Dovini Jayasinghe's user avatar
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Statistical test for data where groups have non-normal distributions with varying distribution shapes

I have between-subject design with 3 different groups where I capture interval data (on scale 1-4 where equal spacing amongst scores can be assumed). The data in groups is not normally distributed ...
klen's user avatar
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How to compare shape of gamma distributions to detect population change [closed]

Sorry if this question is poorly composed due to lack of stats knowledge. Any advice to point me in the right direction would be greatly appreciated: I'm hoping to detect if a dataset originated from ...
mma's user avatar
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What is the shape of the distribution when the sample mean > the population mean? [closed]

What is the shape of the distribution when the sample mean is greater than the population mean?
user131440's user avatar
1 vote
1 answer

Testing data for Same Shape

I want to run a Mann-Whitney test on 2 arbitrary sets of data but I read that one of the assumptions of the Mann-Whitney test is that the data is the same shape. How can I test if the 2 sets of data ...
JeLLyB0x3r's user avatar
2 votes
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L-Kurtosis calculation

I am doing statistical analysis on some signal data and after some reading was thinking that L-kurtosis would be a good numerical value to use in differentiating delta trains and sine waves with ...
Jason K.'s user avatar
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4 votes
1 answer

Does skewness predicts variance?

(with apologizes to this question). Consider two distributions $G$, $F$ both uni-modal and absolutely continuous, square integrable and satisfying: $$F<_c G$$ this means that the standardized ...
user603's user avatar
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