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Questions related to Advanced Statistical Analysis
Hello guys, could someone enlighten me and advise me in choosing a statistical test to evaluate responses from patients before and after a treatment, the variables being categorical (> 2...
29 December 2020 5,976 12 View
I'm working on metabolomics using H1-NMR and I'm doing data normalisation and statistical analysis in metaboanalyst. I don't find any data binning step in Bruker topspin and metaboanalyst. Is data...
08 December 2020 4,590 7 View
I have data on the effectiveness of the three treatments: T1, T2 and T3 for each patient. Each variable is coded dichotomously - 0 = drug not working; 1 = drug is working. The patient could feel...
01 December 2020 1,289 14 View
Hello, I plan to perform a linear mixed model analysis to look at change in cognitive function over 5 follow up waves. I am interested in looking at how this change is influenced by dietary and...
28 November 2020 5,271 3 View
We have very large data sets of populations across five years. We want to compare the proportion of people in different categories statistically, controlling for the differences in sample size....
23 November 2020 8,379 3 View
I want to do a descriptive analysis using the World Values Survey dataset which has an N=1200. However, even thought I have searched a lot, I haven't found the methodology or a tool to calculate...
18 November 2020 1,665 4 View
Hello RG-Community, I have a question concerning a multilevel model: level 1: situations (12 in average; there are two types of situations, each of them 6 in average). level 2: persons (40...
17 November 2020 1,097 4 View
So when using a biserial correlation you are able to test for an association between a continuous DV and categorical IV but can that be done with multiple IVs with a dichotomous DV similarly to a...
11 November 2020 6,259 6 View
Is there some methodology or reasoning that we can follow for this selection? I understand the difference that for two-tailed are of the tail is equally distributed on both ends. But is there any...
27 October 2020 8,183 4 View
Earlier small sample domain was taken for a sample size of 30 or less. But now some recent tables have increased the boundary to 500. What is the reason and which one to follow?
12 October 2020 3,715 5 View
There are many statistical software tools available in the market for quantitative and qualitative analysis. Some are very expensive while some provides student version freely. Which statistical...
11 October 2020 5,150 18 View
I am seeking a clear and exact definition of p_value?
05 October 2020 10,106 16 View
Is there some rule of thumb or method to balance the number of samples vs the sample size. e.g. like a minimum of 10 % sample size or a number of samples = 40% ( like 400 samples for a size of...
01 October 2020 9,314 4 View
I am looking for ways to improve my average silhouette width for my data. So far I have removed columns from the dataframe that have NA values, columns with many outliers as well as columns that...
23 September 2020 8,195 3 View
Hello everyone, I have a dataset of diabetic patients which has been used to train an xgboost model in several outcomes such as stroke, amputation, and more. Originally we used the continuous...
22 September 2020 5,119 3 View
Dear all, I am processing nondiagnostic pottery shards. I analysed fragmentation and abrasion in the field. I first divided my nondiagnostics into clay groups. After that for each clay group I...
26 August 2020 6,524 6 View
There are two groups in the study such as group 1 and group 2. One of the groups received treatment, but the other did not. When the mortality of the groups is compared, it seems that there is no...
18 August 2020 834 5 View
Hello, I wish to calculate inter and intra rater agreement between 2 observers who are gradings Xrays for degree of bony fusion into 6 grades. In all there are 1750 xrays. Which statistical test...
12 August 2020 1,111 4 View
I asked the same respondents about how much luck, their own efforts and connections they need to achieve Goal # 1, # 2, # 3, # 4. (first group). The second group had the same questions and the...
10 August 2020 3,647 5 View
Hi all, I am dealing with data with sevaral features and many of them are highly correlated with each other as well as with dependent variable. In my research on this topics, I found that...
10 August 2020 3,944 5 View
Hi! How to handle missing data using multiple imputation in STATA?
04 August 2020 5,653 4 View
Hello everyone, I have downloaded the 'Process' plug in onto SPSS and I understand I need to use model 1 for moderations, I know which boxes to put them in etc. Moderator = culture...
30 July 2020 384 5 View
Hi, I wanted to know the fundamental basics of a meta analysis. I have read up and found many diff methods being applied to answer a given research question. I want to understand the below: 1....
21 July 2020 4,602 5 View
My design is that of repeated measures (within-subject design). That is, the subjects (name) are the same through the groups (group). This implies that there is dependency between the data, which...
19 July 2020 2,885 12 View