Questions tagged [analysis]

For questions dealing with the applied analysis of a specific dataset or design of experiment. Posts tagged analysis are requesting statistical consulting assistance from the network. Questions tagged analysis need to be phrased appropriately.

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Problem with dimension reduction using pca

Im measuring the concept of group centeredness through 4 dimensions. Of these 4 dimensions i have 2-3 statements. I have a small numerus from the survey. Im running pca for each of these dimensions ...
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Analysis for musicians' resilience?

I'd like to run a test of resilience through a diverse population of classical musicians (international, mix of free-lance and contractual, diverse ages from students to professional, N>100). My aim ...
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How does correlation between independent variable and dependent variable affect models?

I'm trying to fit Logistic Regression and SVM on a standardized dataset with two classes - 0 and 1. It is a balanced dataset. When I plot the feature importance, I see that for both Logistic ...
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Analysis plan for regression with multiple predictors

I am looking at the effect of a mutation in a specific part of the genome on various mental health outcomes. 1 of the predictor variables is if there is a mutation or not (yes/no). The outcome ...
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Factor analysis structured with a dependent variable (not independent variable)

A model from the social sciences has been suggested that income inequality (as a dependent variable) "causes" a range of downstream independent variables including teenage fertility, obesity etc. ...
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How do I display this spreadsheet (in the image) in a readable format to assess what values are increasing over batches

How do I display this spreadsheet (in the image) in a readable format to assess what values are increasing over batches. The values relate to the frequency of alarms. In the image the "property" ...
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Normalization of data in a set [closed]

I have a data set copied from histograms on density of images. I need to normalize the data so that I can be sure of uniformity for the purpose of making it comparable (since I cannot guarantee that ...
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Measure “concentratedness” of 1D data

I have $N$ datapoint dataset $\{x_i, y_i\}$, where $x_i$ are equally spaced over the interval $[0, 1]$, and $y_i$ are non-negative. It is known that $y_i$ is a sum of a signal and gaussian noise. The ...
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How to examine the relationship between categorical variables with several levels?

I would like examine if the job satisfaction of part-time workers is higher or lower compared to full-time workers. My dataset consists of 4125 cross-sectional observations. independent variable: ...
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1answer
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Comparing changes in a response variable over multiple proportions at different sites

Say you have a variable, like average house cost. You have values of this variable at multiple sites in a city, and want to see how it fluctuates with respect to surrounding business type proportions (...
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Do we consider the dataset to be sample even if the data we are given is complete data in analytics?

I was watching an online video on statistics and in the video we were making inferences on a real estate companies data, to predict our future customers. The instructor had all the previous data of ...
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How to deal with zeros with time series analysis?

Hi I am a data analyst that recently moved on to looking at some time series analysis for Covid-19 risks. I have a large financial dataset that contains the bank account balance of customers (both ...
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Analysing Snapchat Data [closed]

I am wondering if there is a way to analyze Snapchat data, using R for example. Could you please guide me to some sources?
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What kind of analysis is appropriate for two groups with vastly different follow-up time?

I have two groups (pre and post-intervention). Pre-intervention was from 2003 to 2016 and post-intervention was from 2016 to 2018. Since the follow-up times are so different between the group, what ...
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Choosing a statistical test for analysis of settlement success in coral

I need advice on choosing the right statistical test. I exposed corals to a chemical in lab. Every day, I collected the coral larvae from the coral every day for 3 weeks. I then pooled larvae from ...
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How do I transform and/or analyse data with left-skewed response variable that will not transform by most common methods?

I am aiming to analyse a response variable (numpick) which has a left-skewed distribution (very low frequency at low values, increasing frequency with response value, peaking at highest value). I was ...
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What is an appropriate statistical technique to use with rates of decay/growth for this estimation problem?

I have the following problem: I have ground truth data on the population growth and the population decay of a certain breed of rabbits (let's say $R$) from $T_1$ to $T_n$. Now, I want to estimate ...
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How to spot/measure artifacts produced by several rotations of 2-dimensional data?

I am trying to transform dataset to mulitiply its size but preserve its initial random nature. I have 5-dimensional numerical dataset which represent particles in plane, produced by Monte Carlo ...
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25 views

Help Selecting Statistical Test

I am looking for advice on how to analyze some experimental data. My DV is a binary response variable - yes or no (coded as 1 and 0). Usually when I run experiments I fully cross all conditions ...
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Newbie Data Analyst Questions

I have recently applied to a Job by a startup that wants to higher a data analyst. I have been going through the rounds and it seems like they want to hire me for the position. I have recently ...
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covid-19 available resources [closed]

I don't even know if this is the best place to ask it but, as a statistics community think somebody here may know something. I am wondering what kind of databases and data are actually available ...
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Estimating small-area distribution using survey results for larger area

To start, I'd like to say that I haven't been able to figure out the general technique that I'm looking for, so apologies in advance. "Small area estimation" seems to be the general concept but I've ...
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How to code a two-way ANOVA with split-plot design using R?

I am analyzing a split-plot land-use experiment and I am stuck on the R code. We used four sites and on each site the following design: We conducted a full-factorial design with two factors (land-...
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Binom.test while including fixed and random factors (GLMM?)

EDIT 12-3-2020 My initial formulation of this question was not to the point. Allow me to rephrase: I have data which could be considered a probability of success as a bernoulli trial. However, there ...
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sales data seasonality

This is the plot of my data and I'm wondering if these periods (on red circles) considered seasonality or not and if so how should I deal with them? can I model without smoothing them? Please ...
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Best linear regression strategy

I have 11 variables (with 4 of them being sociodemographics) that predict my dependent variable. I want to perform linear regression analysis and I have two options. One: Exclude sociodemographics ...
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Analysing outcomes among those at-risk at baseline

Assume a trial of a public health intervention which aims to help individuals improve their physical activity and quit smoking. The trial will include three types of individuals: (1) those who have a ...
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Survival Analysis results are counter intuitive, where am I going wrong?

I am using Survival Analysis to analyse a data set, but i'm having a bit of trouble. The data consists of everyone who has/has not been terminated from employment within a 4 year period. The aim of ...
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Clinical records dataset and drawing some useful and interesting conclusions out of it

I am trying to draw some conclusions from a dataset like the one below. My real dataset is longer and different, but this one represents decently some clinical tests under study. These data are still ...
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Is it possible to perform indirect comparison of before-after/pre-post studies with continuous outcomes (e.g. mean difference)?

I'm currently in progress to perform a simple pooled analysis between surgical approach A and surgical approach B in treating bone fractures. However, as the technique compared involved surgical ...
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51 views

How to calculate pooled mean difference?

I'm currently doing a simple pooled analysis study; which, unlike meta-analysis, does not involve weighing between studies. However, my outcome of interest involves continuous outcome (pre-...
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1answer
31 views

Measure of Similarity Between Scatter Data

So I have two scatter data. I would like to determine the similarity between the two scatter plots. What is the good recommended measure that can be used in this case? Is there is anything simpler ...
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How to statistically analyze data from an observational study (and relate it to a questionnaire)?

I'm going to be doing a study for a psych class which will involve observing how frequently a certain amenity is used in different setting conditions, such as having an informational sign (I will be ...
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How to analyse this pre-test and post-test double-blinded RCT study? [duplicate]

I have conducted a study where participants are split between two groups (treatment and control). I want to measure changes in depression and sleep disturbance pre and post-test (before and after ...
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R: VAR analysis [duplicate]

What does "Pr" and "|t|" stand for in the summary? I'm not good at VAR model analysis. The codes below is from this web site.(https://qiita.com/saltcooky/items/2d0119ea4a10bab6cff2) ...
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What is the best method to determine statistical differences between percentages that do NOT satisfy ANOVA assumptions?

I am working a project where I analyzed image classification accuracy percentages for three algorithms. I laid out 36 plots in an agricultural field and took aerial images over a period of 5 (non-...
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1answer
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What statistical test would be the best to use?

I am currently working on a project for my internship. In the beginning, I was told I was going to have different variables to use, so now I am having to change what my statistical test will be for my ...
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139 views

Lottery task, ambiguity aversion, switching point …which analysis?

I have Ambiguity Aversion as Predictor. I have a lottery consisting of 10 choices, for each choice participants must say whether they prefer the risky lottery or the ambiguous one. So a the end I can ...
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Advice on what model to use to perform a formal analysis

I am using the data psid from the library faraway and want to investigate the interaction between sex and year. Specifically, as the year increases does gender impact income less? I've done some ...
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35 views

T-test and ANOVA suggesting different results?

I'd like to start off by saying I am very much a beginner to statistical analyses, so I might be missing some key ideas here. Context: My study involves an experimental group and control group that ...
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8 views

What is threshold in ROC curve? [duplicate]

Whenever I read about ROC, people say that it is graphical representation of True Positive Rate value and False Positive Rate at various threshold. Whenever I read in detail, people explain that ...
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What is the design of this experiment and how do i analyze it

I carried out an experiment in two locations. For the two locations, the experimental set up was 95 genotypes of a plant in 3 replicates. For each replicate, I had 3 blocks in which the genotypes were ...
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1answer
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True or False: The pattern of the residuals vs predicted values and the residuals vs a predictor based on a 2nd order model are exactly the same

I'm currently working on an assignment for a course in Statistics and was wondering anyones thoughts on this. My friends and I keep going back and forth on which one it is. I think it's true for the ...
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Is there a significant relationship between two data sets?

I am interested in image processing in python. I worked on detecting and tracking particles in an image. I obtained velocity data of particles in different regions. I believe that the difference ...
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How to Rank Parameters using Sobol Indices (Variance-based Ranking)

I am trying to compare different parameter ranking methods. The Sobol Indice method is the most representative method for ranking significant parameters based on contribution to output variance, ...
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1answer
34 views

Linear regressions of fluorescence and Discrete Chlorophyll

I'm pretty much clueless here. I'm doing a project in Springboard's Data Science Career Track. Most of the data science makes sense; the ML part, not so much. I have a data set from USGS - water ...
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9 views

I'm conducting a research with three dependent variables and an independent variable with four proxies

I'm conducting a research with three dependent variables and an independent variable with four proxies. The problem is that I don't know how to test my hypotheses
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Scenario Analysis with a GARCH model - conditional forecasts with hard restrictions on dependent variables?

Waggoner and Zha (1999), see reference below, developed an approach to produce conditional forecasts for VAR models with hard restrictions on the variables using Gibbs Sampling. As an example, they ...
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Interpretation of PCSE results

Hi I would like some help in the interpretation of results with regards to a regression analysis being conducted: One with a simple linear model: enter image description here The other with PCSE ...
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Analyzing Split-plot design

Am new to R. Am teaching myself and I got stuck with a data I wish to analyze. The design is a split plot and I have the following variables: Rep, Mainplot, Subplot, Weeks after Planting and measure ...

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