analysis help

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 intervention). I want to see interactions between-subjects for depression and sleep. I also want to...

I have data for 100 different biomarkers. Each biomarker has data for 4 groups (A,B,C,D) with ~2000 observations in each group. I've read a lot about ANOVA but I'm not looking for a difference in means, only a difference in variances between the 4 groups, for each biomarker. I know there is the...

Hello, I need help determining what analysis to run. I have 2 independent variables (a control and experimental condition) with 4 dependent variables (one scale with 4 subscales, each of which I assume should be treated as a dependent variable.) This is Likert data (ordinal) so I thought I...

Hello, I have abit of a tricky question for you, but first some context. I carried out a study where students completed 2 sets of questions, and had a survey after each one. The first several questions of each survey are identical. What i wanted to measure is how well they did compared to how...

Hi, any help is greatly appreciated. I have data from the same children at ages 4, 7 and 11 for a variable (self-regulation) created from a questionnaire. The data for this variable is numbers from 1-4 (the mean of their scores from the questionnaire). I need to compare the differences...

Hi all, I was wondering if anyone could help me make sense of my results from Structural Equation Modelling for my Masters thesis. I've first conducted a CFA and obtained good fit indices, but SEM results have shown poor fit (χ2 (574) = 837.095, p <.001, GFI below .9 and RMSEA was .062...

Hey everyone! So here's some background: I'm doing a course on data-analysis [SPSS] and my teacher likes the idea of us finding our own solutions, so we don't get much help from him (We're allowed, and cheered on to find help on the internet). So that brings me here! I'm not too good at this...

Hello, I am conducting measurement equivalence on a two country sample (US and IN). I have established configural (baseline) and metric equivalence. However scalar invariance has not been established (the model change checks out but CFI change is less than .002). I examined the modification...

Hi Guys, I was just wondering if you could help me out with some statistics stuff as I'm having a little trouble with interpreting my dissertation test results in a mathematical way. Basically, I have done some testing on reported presence scores when changing different audio...

Hi, I did an online cross-sectional self-questionnaire for male participants only and I am stuck on what method to use when analyzing the data. My hypothesis is simple, I am looking for the male perception towards non-consensual sex, however the questionnaire also talks about other...

Hi all, I'm currently working on a dataset extracted from a questionnaire and entered and coded in SPSS. Im trying to show correlation/relationships between a range of demographic dependant variables and one outcome variable. The data is nominal and often on a scale (ie.how important would...

Hi all, I stumbled across this page while trawling the net for ideas on how to work out my assignment. I was wondering whether anyone could perhaps give me a few pointers. So we were given two months of data (Jun 2009, Jun 2010) of retailer sales, grouped by week. So each row has the week...

Hi having a little problem with this question which i need to learn for my test coming up.. i have produced a dendrogram (on sas enterprise) which consists of 77 countrys with various information. I need to discuss the graph and explain how many clusters i would pick and why? (its more...

Why do you choose the two factors with the highest proportion of variance to use in an analysis? Wouldn't a higher proportion of variance imply less correlation?

Hello, I am investigating the effect of brand personality on brand loyalty. I want to know if certain brand personality traits are more effective at creating brand loyalty than others. I identified 5 main personality traits. Each trait is made up of a number of facets. For example the...

Hi, I'm running a panel poisson regression with fixed effects in Stata. The result in Stata doesn't display a constant. Normally I use standard poisson regression and then the coefficients represent the procentual change of the constant. So I'm confused about how to interpet the coefficients...

Hello, Thanks in advance for the help everyone, I'm new to this site and I really appreciate it. I am currently working on some research and have begun to evaluate my results. I have several multiple regressions and need help discussing the regression coefficients. The difficulty I am...

Hi I am trying to do Cox multivariate regression analysis in a project where I am trying to identify predictors of a particular disease using variables such age, X- ray findings, and other identified known risk factors, and I am wondering how to perform such an analysis using excel, or even...

Hi, I’m having problems with the analysis of one of the tests I’ve done on the evaluation of synthetic speech. The test was set-up like a Turing-Test: to each test subject, 20 sentences were shown (10 original and 10 synthetic). The subjects had to guess for each sentence if it was original...