How to get a CI for the mean in models with a nuisance parameter?

08 September 2019 7,392 12 View

Is it correct to call lo(w)ess "non-parametric"?

It's a weighted least-squares polynomial regression, so it's based on assuming normal errors, and the normal probability model is parametric. However, in some statistics book and online statistics...

09 October 2018 8,722 9 View

Why doen't it work to call "[<-" directly?

When calling x[1]

11 December 2016 1,474 6 View

Are these models equivalent?

31 December 2015 3,973 8 View

How to calculate the sample size (t-test) when additional data is available to estimate the standard error?

Consider following case: There are k different groups, but only the mean difference between 2 of these groups should be tested (t-test, consider the assumptions are met and alpha and beta are...

09 October 2015 5,766 12 View

How does random sampling guarantee equal selection probabilities?

From a frequentist's prespective, "probability" is the limiting relative frequency (of an event). In this philosophy, only results of repeatable processes can have probabilities. Observed data is...

31 December 2014 1,011 41 View

How can I get a confidence interval (CI) for gamma-distributed data?

Short history: As I understood can the normalized (profile) likelihood be used to get the CI of an estimate. "Normalized" means that the function will have a unit integral. This works beautifully...

11 December 2014 6,717 5 View

The old battle revisited: why, say ferquentists, can a hypothesis not have a probability?

Frequentists, as far as I understood, define probability as a limiting relative frequency. And they say that frequencies can only be defined for data (not for hypotheses), so probabilities can...

09 October 2014 7,835 15 View

Does this probability distribution have a name?

The result of a Bernoulli trial is a variable with 2 possible outcomes. The respective probability distribution is calles the "Bernoulli distribution". Considering an experiment which result is a...

08 September 2014 304 39 View

How can I automatically R-label points in a scatterplot while avoiding overplotting of labels?

I attached an example of what I mean. This plot was generated manually. The algorithm should determine which points can be labelled (where is enough space to add a label; this will be typically...

08 September 2014 2,196 7 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View

The Shannon's index is inversely proportional to Simpson's index (1-D)?

I'm having a problem with my bloxplot with Shannon's and Simpson's indexs. The value of Shannon for my Community 1 indicating higher diversity (in relation of the Community 2), but have lower...

26 February 2021 3,033 9 View

How can I set up a good fit SEM model in AMOS?

I am trying to make an SEM model in AMOS for my dissertation but having some trouble with getting a good fit. I am looking for relationships between self-efficacy reported on a Likert scale and...

26 February 2021 8,642 4 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View