Statistical theory and its application. | Contact experts in Statistics to get answers
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Hello, Setting: We have a rather large dataset consisting of somewhat 500 samples containing metabolomics data. The data was obtained by analysing dry capillary blood using HPLC methods, yielding...
05 January 2021 8,927 5 View
I've produced a violin plot for a point-biserial correlation. Main title is there, x and y are labelled, but I want to add a custom text box with the correlation coefficient and significance...
27 December 2020 4,728 4 View
I am trying to assess or predict the use of one specific technology that might have several impacts on one operational activity. This technology is supposed to improve the efficiency of the...
25 December 2020 7,681 4 View
Hello, I want to compare correlations coefficients between two groups, females and males. I have a lot of variables. Is there an easy way to use the Fisher's r to z transformation in SPSS?
24 December 2020 5,118 3 View
I want to carry out PCA on a set of chemical data, some of them in oxide form and some in elemental form. The oxides are in percentage and the elements are in ppm. I have understood that, the...
15 December 2020 2,355 7 View
Dear community , currently working on emotions recognition , as a first step I'm trying to extract features , I was checking some recources , I found that they used the SEED dataset , it contains...
14 December 2020 9,548 6 View
I have a dataset where each data consists of in total 5 groups (can be considered as 5 categorical variable/ 5 unique continuous values) and for each group there are hundreds of points (with yield...
11 December 2020 5,992 8 View
There are many tools to build a PLSR model to predict a response variable Y based on a multivariate predictive variable X (reflectance spectra for example). My question is the following: once we...
07 December 2020 3,211 11 View
Hello! I am performing preliminary analyses on my data set (N= 187 heterosexual couples). When examining the summary of missing values, SPSS indicates that only 0.16% of my data is missing....
02 December 2020 5,675 13 View
I'm currently examining how the behaviours of fictional characters are explained to child audiences through attribution theory as part of a study into the psychology of how children learn about...
28 November 2020 8,404 3 View
Currently planning to work to find the prevalence of hydatidosis among domestic cattle in remote areas. The previous prevalence rate was unknown as no research was conducted yet in that area.
25 November 2020 9,685 4 View
Dear all, I want to compare differences in the drainage capillary pressure curves for different simulations with experimental data. I want to show how close or far I am from the experimental...
18 November 2020 1,314 3 View
I could not get a good fit for a Gaussian model of variation in the duration of a behavior. I thus rounded durations to the next integer (nearest minute) and used a Poisson distribution, which...
18 November 2020 4,214 4 View
We have 2 machines that test products. Both of these qualify the product to be Good or Bad ( Based on amount of leak ). The final outcome is attribute variable (Good/ Bad) whereas the way we...
17 November 2020 828 7 View
I am relatively new to the field of water governance my research interests are focusing on smart metering to control water over-abstraction in the context of African cities, I already have...
17 November 2020 9,467 5 View
First, is there a test to be able to say an ellipse in a PCA plot is "smaller" than another? Second, what is the significance/meaning of a smaller ellipse? (Greater constriction/Less...
16 November 2020 2,388 4 View
Does anybody know and can anyone help with the following? In a partially restricted actor-partner interdependence model (on a dataset of distinguishable dyads) estimated using lavaan in R, the...
16 November 2020 9,690 3 View
I'm taking some measurements using Raman spectroscopy of healthy pig eye samples using a new excitation wavelength and my supervisor said to choose a sample size to allow for spec/sens of 85%....
02 November 2020 8,740 6 View
Given the constraints of COVID-19, our IRB is limiting data collection that can be completed in-person. Thus I am looking to utilize teleadministration and comparing that to previously collected...
29 October 2020 1,401 2 View
Univariate normality test tells me I only have 2 values among my predictor variables that are >3 SD. Multivariate normality test tells me a have a few outliers. I also plotted residuals using...
28 October 2020 9,718 5 View
Let's say I have this hypothetical data of height to chance of someone have head concussion: Height 176 +- 10 in Concussion Group with n = 100 Height of 155 +-12 in non concussion group with n =...
26 October 2020 2,470 7 View
I have numerous non-normal distributions that, for the most part, have the same shape (n = 190). The variables are test scores and have a floor value of 5 and maximum of 50. They appear to be...
23 October 2020 9,457 3 View
Hi. I am trying to plot Euler's diagram with counts and percentages of counts related to the total cohort (n=1615). I have written the following code: plot(euler(c( "LUTS"=98, "Symptoms of...
13 October 2020 3,993 2 View
Could you make some points about the difference between distribution function and probability distribution function?
05 October 2020 5,040 9 View