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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41 views

Advice on type of analysis

I do not have much experience in statistics, so I am reaching here for advice. Just feeling a bit lost to start with! I have data on 100 trees, for each of which I have the following attributes: ...
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16 views

Statistical test for questionnaire with various components

I was asked to analyze a research questionnaire that consists of a Likert scale, a checklist, and questions with yes, no, and don't know as response, as part of the pilot testing. I was struggling ...
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94 views

Analyzing relationships in 5 time series (cointegration)

I don't have a dependent variable in this case. 5 time series correspond to 5 different sections of the same company. I want to analyze the relationships between the sections based on these 5 time ...
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62 views

What tests to carry out when all variables are categorical?

Edit 1 - Actually the "upcoming concept related to how employees work" is 4 day work week... i am trying to find perception of employees of 4 day work week...The employee has various ...
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207 views

Analysing Binary data in a mixed design?

I ran a study with two IVs, a between-subjects manipulation Hands vs NoHands, and a within-subjects manipulation High and Low. The outcome of what participants did was recorded and then show to one ...
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2k views

Conducting a three-step Latent Class Analysis in R

I'm trying to conduct a Latent Class Analysis in R using the poLCA package, and I have now become stuck on two aspects of the process. I have conducted Latent Class Analysis separately for males and ...
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12 views

How to cluster data based on temperature values and time

I'm having an issue analyzing data of oil temperature over time (vehicle engine oil). My goal is to detect the parts where the temperature cools down over time in this "exponential decay" ...
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2answers
359 views

Predict number of users

I have a pretty basic question, but am pretty far removed from stats and modeling. I have historical data (daily, weekly, monthly, however I want to slice) for a few years and I want to predict the ...
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6 views

Taking quantities sold into account with Market Basket Analysis

When performing a Market Basket Analysis you can calculate the 'support', 'confidence' and 'lift' of the Antecedants products (LHS) and consequents products (RHS). However, if I want to use a Market ...
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173 views

Mediation analysis with more than one predictor

I conducted a mediation analysis with 6 predictors, one mediator and one outcome variable. Now I am trying to write up the results but I am not quite sure how to structure my report... (e.g.: write ...
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12 views

Which statistical test to use? (Repeated measure, ordinal DV)

I ran a pilot study and now that I have the data, I've become confused on how to analyze it. Participants were simply given a list of ~50 behaviours and asked to rate on a Likert scale (1-9): ...
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15 views

What methods to do for analysis

So i am designing a study where there are 2 groups of students. One group which is part of Y number of departments have not received trainingA. The other group of students which are part of X number ...
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1answer
40 views

Regression for a data frame of bicycle services

I have a data frame of bicycle services from Juanary 2020, that look like this Travel_Id User_Id Gender Start_time End_time Origen_Id Destiny_Id Age Duration Day Lat_Ori Lon_Ori Lat_Des Lon_Des ...
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16 views

A times series problem with variable length and time shifted sequences

I would like to get some guidance (maybe papers, algorithms to try) on a times series problem and I don't know how to approach it, as I am a novice in the domain. The problem brings several challenges ...
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8 views

Representative Sample of large dataset

If you wanted a representative sample to analyse interactions/posts, but couldn't pull the huge amount of data online has(billions/millions of records), how would you go about getting your sample for ...
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8 views

Mediation analysis with covariates SAS

I am conducting a mediation analysis to analyze the effects on moral reasoning towards AVs. I already detected a suitable mediator and do now want to examine the effect of possible covariates (age, ...
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22 views

Statistical analysis single group without controls

I will be working on scientific research where I am looking at the outcomes of a single group of cases. Unfortunately we don't have any comparable cases where the same level of detail is available and ...
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25 views

Why is the Wilcox test not significant for this data?

The 2 data.frame count values look quite significantly different to me, so I'm wondering why the output of the Wilcox test is not "significant." Here is ...
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21 views

How are R-square and mean absolute error related? Which is more important for evaluating performance?

I have some data which is divided into training and test. I ran regression using training data and got an R-square value of 0.8, and a mean square error of 10 using the original and predicted values ...
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10 views

Does a higher score on 2 social behavior questionnaires, relatively often precede a lower score on a complaints questionnaire, using 3 time points

I would like to link a quantitative outcome measure/dependent variable (score on a questionnaire) to the scores on two questionnaires measuring the same construct (quantitative independent variable, ...
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62 views

Which analysis for whether more likely to give response matching stimuli than not?

This is probably incredibly basic but I'm a bit lost. What analysis would you suggest to identify whether participants are more likely to make a choice (out of 4 categories) which matches the ...
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186 views

Using Nvivo to analyse changes over time

I am currently undertaking a Thesis research paper where I am seeking to explore and understand how views on a certain topic have changed over time as reported in the media. I am going through a ...
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28 views

What is the best statistical test to compare the competitiveness of 10 football/soccer leagues within a time range?

I was wondering what stat test is the best to find out which football/soccer league is the most competitive. The leagues that I would choose for this analysis are either based on the countries that ...
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2answers
44 views

What is the result of $\frac{\partial^2 \ell(\beta)}{\partial \beta \partial \beta^T}$?

For logistic regression model, the log-likelihood function can be written as $$\ell(\beta)=\sum_{i=1}^N(y_i\beta^Tx_i-\log(1+e^{\beta^Tx_i}))$$ This is a $(p+1)$ nonlinear equations in $\beta$. To ...
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247 views

Statistical tool to compare different indices

In my research study, I have determined seven indices to measure a physical phenomenon. These indices are derived from different types of rheological tests but all measure the same phenomenon. Of ...
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66 views

Compositional data using R and difference between groups?

could you please help me in my research. I have a problem that can summarize: Is there a difference between stores in terms of the share of sales percentage in the 4th quarter. ...
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7 views

How would you approach this odd pre/post research design?

I have obtained two datasets. The pre where users were designated by a unique ID were asked to state what sources they used to make their decisions. Their decisions involve making a binary choice of ...
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109 views
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37 views

How to compare time series with different time stamps

My data consists of several time series of the form $A_i = [ (t^i_0,x^i_0), (t^i_1, x^i_1), \ldots, (t^i_{n_i}, x^i_{n_i})]$ for $i \in \{1, 2, \ldots 20 \}$ $B_j = [ (t^j_0,x^j_0), (t^j_1, x^j_1), \...
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35 views

Quantifying Similarity of Survey Responses

I have 6 survey responses with Likert scale questions and some basic demographic information. The 6 responses are pulled from the same group. They all met my selection criteria (School principals ...
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1answer
11 views

Gauge R&R analysis - Preicision of a system

I never attempted to do a GR&R analysis before so I'm sharing an overview of what I would like to attempt to do and hopefully I would get some insight/advice/reference on which approach I should ...
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22 views

Experimental, Control and Waitlist Control analysis - treating waitlist control as 2 groups: experiment and control?

I have a 2.5 month intervention program that I would like to test. I have 30 experimental subjects, 30 control subjects and 30 waitlist control subjects. For experimental subjects, data were ...
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33 views

Which analysis should I use on spss

There are 20 participants. Each participant is subjected to 4 conditions and each condition is repeated 9 times. Each condition yields 2 outcomes. I’m not 100% sure which analysis would be best used ...
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6 views

Correspondence Analysis GSVD (generalised single value decomposition) proof

I'm not able to found a simple proof or just a normal detailed proof of: \begin{aligned} \mathcal{X}^{2} &=n \text { trace }\left(\left(\mathbf{F}-\mathbf{r c}^{\prime}\right)^{\prime} \mathbf{D}_{...
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Can I run moderated mediation analysis on the a, b or c paths alone using mediation R package?

I am trying to run a moderated mediation analysis and I would like to know if there's an influence of the moderator in all paths, together and separately, with ...
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266 views

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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27 views

How can I do chi-squared tests on missing data?

I have a large dataset looking at how race is recorded. I want to see if there is an association between race being recorded in a specific dataset and not being recorded in another. For example, if ...
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23 views

How many types of randomization are there? And how they each dealt with in the experiment's design or statistical analysis?

I am trying to understand randomization in experiment design, and am very confused, because there appear to be several types of randomization possible. For example, for a Categorical Factor with Non-...
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2answers
62 views

How do i interpret this Scatter Plot

I'm researching on the relationship between Scholarship and years. I have scatter plot below. The x axis is equal to the total amount of scholarship for a student. The y axis show the term a student ...
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17 views

Given a distribution of the frequency of use of different materials in production orders, figure out how many top-used materials enter 98% of orders

I'm looking for help in a strategy for solving this. Tried just getting a ppf of the beta distribution, where q=98%, but I'm not sure I'm taking a right strategy altogether, because there is no data ...
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54 views

Is this an example of a univariate analysis?

Nonstatistician needs help with terms. Is the following an example of a univariate analysis?: Chances of getting a job at Microsoft with respect to demographic variables such as age, gender, race, etc....
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8 views

Use aggregate data with a linear regression

I am working on a project for my own portfolio regarding movies dataset. I want to go further on the idea that there is a pretty high correlation between Budget and Revenue. Alex the analyst made a ...
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1answer
174 views

Does Sklean have a Gaussian Discriminant Analysis (GDA)

I was trying to look for the Gaussian Discriminant Analysis in sklearn however I was unsuccessful and I was wondering what it the name of it. I was about to find the LinearDiscriminantAnalysis and ...
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64 views

What statistical treatment for respondent profile and 5 point likert scale survey question?

What statistical treatment will I use using survey questionnaire with respondent profile and 5 point likert scale?
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712 views

Predictions using CoxTimeVaryingFitter for survival analysis in Python

For a customer churn analysis , i am building a time varying cox model in Python (available under lifelines package) to predict survival probabilities. The model object CoxTimeVaryingFitter() ...
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19 views

How to measure ALL independent variables in ALL AND DIFFERENT combinations influence the dependent variable [duplicate]

Different combinations for independent variables: what I need in the end EDIT: How to measure ALL independent variables in ALL and DIFFERENT combinations influence the dependent variable (PLEASE see ...
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22 views

Should I analyze this data using a Friedman test or another non-parametric test?

Last year, I had previously ran a pilot study looking at certain effects color had on how individuals perceived food. This year, I completed a larger study with a more refined methodology. In the ...
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33 views

Analysis for time to event

In a study I am conducting, I am looking at the time to event (use of opioid analgesic) as a marker of effective analgesia (pain relief) effect for morphine given intrathecally prior to the operation. ...
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6 views

What approach do I use to analyze this F&B sales data?

I work as a data analyst at a theme park (kind of like disney) but we operate only during 4-6 months in an year. I was asked to analyze the F&B sales at the different locations in the park and ...
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1answer
60 views

Fitting a survival model to see if there is interaction between gender and age

hi I am new to survival analysis. I am trying to fit a cox regression model with age, sex, type of case(local vs imported cases), and regions(urban vs rural). I tries to fit two model ModelA ...

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