0
votes
0answers
4 views

How can you detect outliers in a group of face images?

I'm trying to filter an image database which contains some irrelevant pictures. All the faces are labeled with points around the face contour, eyes, mouth, eyebrows, have age and gender. The faces are ...
0
votes
0answers
10 views

Sample size calculation, linear regression

I have just had my viva and my sample size calculation was criticised as it was based on r2. I was told to base the sample size on the minimal magnitude of association. My outcome variable is HbA1c, a ...
0
votes
1answer
14 views

Getting Expected Value from Monte Carlo Simulation

There are two independent uniform continuous random variables $X$ and $Y$ (such that $0 \leq X \leq 10$, $0 \leq Y \leq 10$). The function $f$ is the difference between the two random variables ...
0
votes
0answers
12 views

Statistics in Agronomy

I'm looking for good references, textbooks or survey papers on the application of statistical methods in agronomy, farming or food industry. Anything related to these domains in terms of modeling, ...
0
votes
0answers
3 views

Training and Activating a 2 layer deep network

I've been working with synaptic.js to make neural-networks in the browser for a while and I've decided I want to implemented deep-learning for a project I'm working on ( connecting an lstm to a ...
0
votes
0answers
7 views

2SLS causal effect interpretation

I would be very grateful if someone could help me to interpret 2SLS results produces in R. In particular, I am interested in the result on causal effect. I want to know whether it is CC that affects ...
0
votes
0answers
6 views

Regression imputation of missing data based on OLS effects

Let's say we have a two-way with interaction experiment with missing data. Being the dataset: ...
0
votes
0answers
2 views

Resouces, tutorials or courses for data/text manipulation [on hold]

Online and free course or complete tutorial for data/text manipulation?
0
votes
0answers
6 views

multivariate general linear model

If I want to test if losing control over eating during pregnancy (my independent variable) can predict birth weight (dependent variable) and to do that I did general linear regression. Now if I want ...
0
votes
0answers
7 views

what exactly is projected gradient descent?

I am reading the article with title "metric learning by collapsing classes" http://papers.nips.cc/paper/2947-metric-learning-by-collapsing-classes.pdf.There are some questions which has bothered me ...
0
votes
0answers
3 views

Choosing a tech stack for data/text manipulation [on hold]

What is the most powerfull technonology stack for huge data/text manipulation, python, R or Bash tools (sed, awk, cut, tr, etc). What are the pros and the cons of which one?
0
votes
0answers
3 views

Test If Mean Probability > 0 In Binomial GLM

MacOSX 10.9.5, R v.3.1.0 How can you use a binomial GLM to test whether the mean probability of an event is greater than 0? Here are some data: ...
0
votes
0answers
8 views

time series forecast problem

i have a resaerch in forecasting population size in my country by using exponential smoothing method, my data was for six years, for several states, i used spss program and used time series analysis, ...
1
vote
0answers
14 views

Interpretation of coefficients in linear regression: first difference of logs

what is the correct interpretation of coefficients in time series regression when using first differencing on logs of the DV and in certain IVs. FD(lnY)=c+beta1*ln(X)+beta2*FD(lnZ) The log ...
0
votes
0answers
3 views

What is the mathematics behind the GAM prediction intervals?

From the R gam function available in the gam and mgcv package there is the option to obtain ...
1
vote
0answers
34 views

Why does drawing one card at a time increase the probability of choosing the Ace of Spades?

If you draw 5 cards from a standard deck of 52 cards, then the probability of your hand having the Ace of Spades is: $$\frac{51\choose 4}{52\choose 5} = \frac{51!5!47!}{4!47!52!} = \frac{5}{52}$$ If, ...
3
votes
2answers
32 views

Is nominal, ordinal, & binary for quantitative data, qualitative data, or both?

I'm getting wrapped around data types and I need some help: If you look at the picture above (taken from here), it has the data types like this: Quantitative (Discrete, Continuous) Qualitative ...
0
votes
0answers
15 views

How to do an analysis of variance?

I ran an experiment in which probands had to rate (1 = dislike, 2 = like) how much they liked each of five fruits (apple, peach, orange, banana, strawberry). I now have results: ...
2
votes
2answers
17 views

Strictly Stationary Time Series with Infinite Moments

Can someone give me an example of a strictly stationary time series with infinite moments? I am reading a book on Time Series by Wayne A. Fuller where it is said that a strictly stationary time series ...
0
votes
0answers
10 views

Clustering Standardized Mortality Ratio

I am bit new to the whole clustering idea. I have a data set that gives information about the SMR in the different states of America from 1995-2000. Hence I want to apply clustering techniques ...
0
votes
0answers
8 views

Fixed effects regression using sex as the unit of analysis

I have time series data for 10 time points for both males and females. Would it make sense to have sex as the entity in the panel approach?
0
votes
0answers
25 views

Non parametric analysis

The my dataset is not normal distributed. In order to apply a non parametric analysis, exist only the Kruskal Wallis test or others? I need to find a test similar to ANOVA to apply a dataset not ...
0
votes
0answers
28 views

What is the best way to test normality for a very large sample size 15000? [duplicate]

Also do I need to test the normality for the categorical data? Thanks
0
votes
0answers
14 views

Gaussian processes - Covariance matrix is not positive definite with SE kernel [on hold]

I am trying to implement the simplest example of a Gaussian process in Matlab. I want to draw samples from a prior distribution. Also I want to use the Squared Exponential kernel. Unfortunately the ...
0
votes
0answers
10 views

Non-vector data and SVM?

My research is on antimicrobial peptide classification and prediction. I have gathered peptide sequences of lengths ranging from 10 - 200 and classified them using different machine learning ...
0
votes
0answers
7 views

Distribution of trace of the covariance matrix

I try to implement a two stage procedure for a multidimensional confidence region with a fixed shape regarding to the handbook of sequential analysis (Ghosh 1991, p. 33ff). To do that, I have one ...
0
votes
0answers
6 views

Recommended Study Area For Processes

I am looking for a machine learning area that deals in processes for logistics. If anyone can show me some use cases or even point me in the direction of a couple of algorthims. Im currently using R ...
1
vote
2answers
33 views

Observed Vs Unobserved Variables [duplicate]

Can anyone explain the difference between observed variables and unobserved variables (preferably in plain English ) ?
0
votes
0answers
7 views

GP regression - Matern kernel gradient issue

I'm trying to use a Matern 5/2 kernel for GP regression, so my kernel function is $ K(x,x')\triangleq\theta_0(1+\sqrt{5r(x,x')}+5/3r)\exp(-\sqrt{5r}), $ where $r(x,x')\triangleq\sum_{d=1}^D ...
0
votes
0answers
19 views

Complement of statistical significance test

I am applying statistical significance tests like the Kruskal-Wallis, Wilcoxon and ...
1
vote
1answer
17 views

Data splitting using kennard stone [on hold]

I would like to use kennard stone algorithm for splitting a dataset into training and test set. Does Weka /Rapidminer/any free software with GUI has a feature to do this? If so, would like to know the ...
0
votes
0answers
15 views

Calculating Cumulative Hazard Function [on hold]

Why are not hazard.km and quantile.km functions working in R ? ...
0
votes
0answers
10 views

How to check if the data follow a certain Conditional random field model

I have certain data for which I think that there is a relation between neighbouring points given certain features. However, I don't know how to get intuitive plot that shows this relation. I checked ...
0
votes
0answers
9 views

Is there an algorithm for independent component analysis without whitening

I am looking for ICA algorithms that do not require whitening step during pre-processing. Any papers or algorithms available? Thanks Quant
-2
votes
1answer
42 views

What property of logistic regression is useful for modeling user behavior? [on hold]

I want to know that what property or attributes of logistic regression make it to useful for modeling user behavior.
0
votes
1answer
24 views

What is similarities and difference between statistical inference and hypothesis testing?

What is similarities and difference between statistical inference and hypothesis testing? I am confused between those
1
vote
0answers
13 views

Hierarchical Bayesian Regression with an Indicator Variable, one group has all zeros for the IV Variable

I'm attempting to form a Bayesian Hierarchical Regression Model and one of my regressors is for an indicator variable. My hierarchy structure has separate group-level regressors related across-groups ...
-1
votes
3answers
40 views

Recommendation list of books for hypothesis testing?

Recommendation list of books for hypothesis testing? More precisely, i need list of standard theoretical textbooks that focus on hypothesis testing used in US graduate schools and these books are ...
0
votes
2answers
24 views

What is the name of subject for testing which distribution the set of data follows?

What is the name of subject for testing which distribution the set of data follows? I become frustrated since I am a beginner in this area.
3
votes
1answer
86 views

Goodness of fit. How to evaluate if polynomial of order n+1 gives statistically better fit than polynomial of order n?

I fit polynomials with increasing order to some data. What is the best way to evaluate if the additional parameter of polynomial of order n+1 provides a statistically significant better fit than the ...
0
votes
0answers
11 views

Conceptual Question On the application of Radial basis function in a paper

I am struggling with the concepts of using Radial basis function using radial basis neural network function in the application of modeling a PRBS signal sequence generated from a non-linear system. ...
0
votes
0answers
10 views

Constructing a normal probability plot template in Excel [on hold]

How can I create a blank normal probability plot template in Excel? I need to use a paper version in a very rough atmosphere. There is a blank example at this website which I like. ...
0
votes
0answers
11 views

ANOVA table help

I need to find values for the starred values. I have been trying for some time but cannot figure out how to find them. I was able to find the Degrees of freedom, F and Significance of F. I have no ...
0
votes
0answers
7 views

stationary and coefficient of variation [on hold]

I am going to use coefficient of variation to monitor a process, then my problem is that this coefficient is not stationary, so i did log transformation using Sewall Wright (1952) how showed the ...
1
vote
2answers
14 views

What are some good (and fast) alternatives to dynamic time warping?

I am planning to cluster tens of thousands of time series of different lengths into two groups.
0
votes
0answers
8 views

How to find if any treatment is statistically better or worse in gene data given one standard method and 3 variations

Sorry I am a biologist and it appears am not quite confident enough for statistical analysis. I have datasets that represent different treatments on a biological system. It records how many genes have ...
0
votes
0answers
7 views

cross validation for cart

When a dataset is given and it is divided into N parts, training a Cart on N-1 parts and testing it on the remaining part (and doing that N times, i.e. for each possible leave-out), one ends up with N ...
0
votes
0answers
12 views

Potential setup for Differences-in-Differences and self-reporting data?

Here is the background. I have two datasets of non-profit organisations in an African country in 2005 and 2010. In 2005, there was a small portion of the organisations active in malaria-related ...
1
vote
0answers
24 views

Probability of 10 (somewhat) consecutive events

My question to you: can you please tell me if I am doing things correctly or I am off base? Thanks! Objective: to determine the probability of 10 independent people having a one base pair mutation ...
1
vote
1answer
17 views

Why is the energy and the probability of a configuration related in a Boltzmann machine?

According to Hinton's slides (slide 34) the following relationship holds for Boltzmann Machines in thermal equilibrium: $$ p(v,h) = \frac{e^{-E(v,h)}}{\sum_{u,g}{e^{-E(u,g)}}} $$ To me this is not ...

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