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How can I separate the abundance factor of the incidence results?

I must calculate the incidence values for Watermelon Mosaic Virus in different seasons within of habitat. This incidence data comes from infection detection of some plant sampled in different habitats...

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Cross Validated Asked on 2 years ago

Chi Square Test on non-numeric data in R

Currently, I'm working on an R project for the university. Based on this table: https://drive.google.com/file/d/13aJr5MHLxJ5Zgv0ZdoQzPU7PutLGTDS4/view?usp=sharingA company would like to introduce an electronic negotiation support system. At the...

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Cross Validated Asked by Ruffybeo on 2 years ago

How to make correlation test with compositional data?

I have a compositional data set> str(dfa)'acomp' num [1:53, 1:4] 0.263 0.26 0.264 0.266 0.255 ...- attr(*, "dimnames")=List of 2..$ : chr [1:53] "3" "4" "5" "6" .....$...

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Cross Validated Asked on 2 years ago

What are the parameters in signal recovery? Whether source of these parameters are the sampling property of impulse response?

I was reading the following book: Juditsky, Anatoli, and Arkadi Nemirovski. Statistical Inference via Convex Optimization. Vol. 69. Princeton University Press, 2020. Here, I could not visualize the appearance of...

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Cross Validated Asked by Lakshman on 2 years ago

What's wrong in this derivation of back-propagation errors?

I'm trying to find a rigorous derivation for the backpropagation algorithm, and I've gotten myself into something of a confusion. The confusion comes from when and why people transpose the...

1

Cross Validated Asked on 2 years ago

How does probability of default evolve over time?

Say I have a probability of default of 0.02 (which is annual so over next year) for a certain client. Then say this client takes out a 180 day loan,...

1

Cross Validated Asked by mathella on 2 years ago

Finding $frac{cotgamma}{cot alpha+cotbeta}$, given $a^2+b^2=2019c^2$

This is a question that appeared in the $2018$ Southeast Asian Mathematical Olympiad:In a triangle with sides $a,b,c$ opposite angles $alpha,beta,gamma$, it is known that $$a^2+b^2=2019c^2$$...

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Mathematics Asked on 2 years ago

Number of irrational coordinates of the circle $x^2+y^2=5$.

It is given in the book by Malcolm Cameron, titled: Mathematics the Truth; that the circle $x^2+y^2=5$ has an infinite number of points with at least one coordinate irrational,...

1

Mathematics Asked on 2 years ago

Splitting and adding the numbers

All the natural numbers from $1$ to $100$ are written adjacent to each other in a single row. Now, this is considered as a single number, $N$...

1

Mathematics Asked by Shane Watson on 2 years ago

Expectation of (non-linear) transformed random variables

If I have a two correlated normal distributed random variables, i.e. $A sim N(m_a,sigma_a^2)$ and $B sim N(0,1)$, with correlation coefficient $ Corr(A,B) =rho$, then I want...

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Mathematics Asked by Selos on 2 years ago

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