spss

  1. A

    What stats tests should I be running?

    I have data looking at the number of different prey species and the number of different predator species that visited a waterhole and I'm categorizing by time, so eg. 3-6am : 5 prey, 2 predator 6-9am: 10 prey, 1 predator ect. I've tried doing a 2 way anova, and chi squared test but I dont...
  2. C

    Why is there a difference in the confidence intervals calculated by SPSS compared to SAS and Epi-Info 7?

    I writing sample code for colleagues in developing countries who will use it to analyze a multi-stage, cluster-sample survey that measures the prevalence of infection with soil-transmitted intestinal worms. So far, I have used three of the software packages they might use: IBM SPSS Statistics (I...
  3. A

    What Stats should I do?

    I have data looking at the number of different prey species and the number of different predator species that visited a waterhole and I'm categorizing by time, so eg. 3-6am : 5 prey, 2 predator 6-9am: 10 prey, 1 predator ect. I've tried doing a 2 way anova, and chi squared test but I dont...
  4. L

    Ordinal logistic regression - how to calculate odds ratio?

    I am running ordinal logistic regression in SPSS. I would like to calculate odds ratios. What do I need to add to the syntax to obtain odds ratios? Currently my syntax looks like this: PLUM druguse WITH age yrsill BY Any_MH group /CRITERIA = CIN(95) DELTA(0) LCONVERGE(0) MXITER(100) MXSTEP(5)...
  5. M

    One sample or independent samples t-test?

    Hello everyone :) I have a problem with a mark I have received regarding my stats assignment. The data was comparing management scores (scale variable) between countries (nominal variable with 7 categories) One of the tasks was to "Test the null hypothesis that there are no significant...
  6. P

    Geisser-Greenhouse Correction Nonsignificant Effect

    I've read several pieces of documentation that say that the Geisser-Greenhouse correction for sphericity always increases the p value. I've noticed in SPSS that if a test is not significant (before any correction), sometimes the Geisser-Greenhouse corrected value is actually less than the...
  7. A

    3 way ANOVA following it up

    This is quite simple question but im more simple :p I have DV and 3 IVs, each 2 levs. Making up example, lets say they are: DV=performance%, IV1=trial type (seeing, hearing) IV2=item type (target, distractor) IV3=confidence (high, low) Subjected to a 2x2x2 RM ANOVA in SPSS and i see no 3 way...
  8. S

    Constant not sig. in multiple regression - does it matter?

    I did a hierarchical multiple linear regression in SPSS with three predictor variables. All the variables have high F-values and are highly significant at each step of the model, but the constant is not significant (0.079) in the last step. Should I disregard all the results just because of...
  9. E

    multiple IVs or multiple levels?

    Hello I’m having trouble deciding if experiment has 4 levels or 3 IVs and 2 levels. Any help would be greatly appreciated. I also need help deciding what statistical analysis to use on SPSS so in my exp I used the same group of ppts who all watched a slide show. This slide show was testing...
  10. J

    How do I setup my data for mann whitney?

    Hi, I have difficulties using SPSS for my study, I'm not entirely sure which analysis to make. I'm trying to compare the velocity of sneezes between groups (neuro disorder + non-neuro). e.g. I'm having 15 participants with results ranging from 0.1 to 0.6 and a control group of 15 people with...
  11. P

    Error message for weighted kappa

    I am working with ordinal scales for cerebral atrophy (ratings 0 to 4) and vascular burden (ratings 0 to 3) assessed by two raters. I have installed the extension bundle for weighted kappa from SPSS (version 25) but I keep getting the error message "some ratings are less than one this command is...
  12. M

    Problems with GLMM results

    Hi all, I apologize if this is a stupid question, but I'm kinda new to GLMM on SPSS. I'm analyzing non-normal data (hormonal response from primates to different factors) from a 2 year study and I'm having some trouble interpreting my GLMM results. All the results I get give me p=0.000 which I...
  13. A

    Chi-square post-hoc test - Helpless

    I have been looking around on the net looking for the best way to do a post-hoc analysis for multi factor significant chi-square test, with no success. I have a data-set of patients with different disease subtypes (Lung cancer subtype A-H). So my two main variables are - Ethnicity (12 levels) -...
  14. T

    Help URGENT deadline!! What data analysis method should I use to test the effect 1 variable has on 3 other variables ?

    Hello, I’ve just joined and am in need of any help that I can get. Basically I wanted to test whether phubbing ( snubbing someone to use your phone) impacts relationship satisfaction, sense of self-worth and respect for your partner. Does anyone know what statistical analyses I would need to...
  15. R

    Generalized method of moments/identification through heteroscedasticity

    Hello to all :) First of all sorry for my poor english. I am sadly not a native english speaker. Right now I am doing an event-study for my thesis. It focuses on the impact of the ECB on the german stock market. I found many different approaches but the approach to use the GMM seems to be...
  16. T

    Which statements need to be reverse coded?

    I'm having trouble with deciding which statements need to be reverse coded. I'm needing assistance to help me understand the concept and study.
  17. J

    Is a Fisher's Exact test in a 7x9 contingency table feasible?

    Hello all, I have a question regarding the use of SPSS (i.e. its capability) to execute a Fisher's Exact test for large, sparse RxC contingency tables. I would like to test whether or not a certain correlation exist between my rows (diagnostic groups) and columns (laboratory tests) (see below)...
  18. O

    Mann-whitney U test??

    What if I have two independent groups. In one of the groups age is normally distributed and in the other group age is not normally distributed. Which test should I use to analyze if there is a significant difference between the groups? Mann-whitney U test assumes both groups are not normally...
  19. Z

    Help with question: What test should I use?!

    Hello. I am trying to analyse whether the weight of my patients (in 3 different treatments) has any impact on their resistance to electric current. The weight is normally distributed. I use SPSS, and I am choosing to analyse a the data using a one-way ANCOVA, since I have 1 independent...
  20. H

    Help with my research project

    Hi everyone, Currently I am working on a research project in the Netherlands, while studying Pharmacy. My study consists of 2 groups of different sizes. group 1: 50 patients (patients using the drug metformin) and group 2: 100 patients (control group, non diabetic). I want to investigate if...