spss

  1. N

    Whats the best statistical analytical method to use

    Hi, I have a data set which has a treatment variable and some outcome variables which are the result of the treatments on certain markers measured daily. I would like to see if different levels of the treatment resulted in the differences in the outcome variable (there are 4 of these, each...
  2. N

    Looking for appropriate loop

    Hi! Hello! I am looking for solution which lead me from yellow to green results like that: As you can see, there are 0-1 coding data with sysmis, always five 1 per line. Thre are 20 variables (p1,p2, ..., p20) and I need to recode them into 5, using number of columns. I have started with...
  3. P

    Anova test post-hoc error

    Dear All, Please help me with my statistics... I am using 5 different dimensions to interpret the correlation among them. For instance, Burnout is negatively related to engagement. All dimensions have at least 3 Lickert scale data. Now, I would interpret the analysis among them, trying with...
  4. M

    Cohort and case-control study

    Hi! I am in great need of advice. Is it possible to report the results form a Cohort study along with results from a case-control study, if the case-control originated form the cohort? For example, there is a primary outcome that I want to evaluate in my cohort study, where there are 400...
  5. L

    SPSS Regression - Independent Variable excluded

    Hello, I was running a linear multiple regression as well as a logistic multiple regression in SPSS. After that when looking at the results, I realised that in each regression, one independent variable was automatically excluded by SPSS. Did we do something wrong here or what do we have to do...
  6. M

    Comparing correlation coefficients

    Hello, I have a large sample of patients who have had a TIA, minor stroke or major stroke. I have been looking at correlations in each of these three groups. Is there a statistical test in SPSS (or elsewhere) that would allow me to compare the correlation coefficients between each of three...
  7. T

    Help with stats work

    Hi everyone at Talk Stats, I've really been struggling on the correct method to use to prove/disprove if my results are statistically significant. For the context in 2006/07, the UK tuition fees have changed from £1k to £3k and then again in 2012 to £9k. Attached is a text file of my collected...
  8. F

    Cox regression results interpretation

    Hi! I am currently working on a statistical analysis on a prospective cohort population. We are looking at a specific protein concentration at baseline and relate this to a certain outcome. The outcome group have been matched with twice as many control individuals from the same cohort. The...
  9. F

    Determining significant difference in mean ratings between two products

    Hi all, I have gathered 180 respondents and asked them to rate two products (so each respondents rates both products). The only difference between the two products is that one product has an extra feature and the other does not. Now I want to know whether there are significant differences...
  10. J

    HELP! SPSS - Independent T- test - t cannot be computed because at least one of the groups is empty

    Hello, I have a question regarding the independent t-test in SPSS. I already run a frequency test which does not show any data missing. What can I do to find the mistake? I want to analyze if there is a difference between the answers of the male and female population. Help is very much...
  11. S

    N changes when weighting cases in SPSS

    Hello! I'm stuck here while analyzing data in SPSS and I could really use some help. I'm weighting cases in my dataset, but when I run any analysis the N in the output has changed from 189 to 176. This puzzles me, each case has a weighted value when I check my dataset. Where do I go wrong? This...
  12. S

    What test to use in SPSS....PLS HELP :((

    Hi, I'm trying to write my dissertation for my 3rd year undergrad project and I am really stuck with the stats :( I carried out an observational study using questionnaires looking at public knowledge of dementia. I specifically want to look at how knowledge of Alzheimer's Disease (AD) and...
  13. G

    Which stats test should I use?

    I am using SPSS to analyse data. I would like to know whether there is a correlation between age and having diabetes (categorical - Yes/No). What is the most appropriate test to use for this???
  14. O

    Choice of test

    Hi all, I'm currently inputting the results for my dissertation on 'the effects of caffeine ingestion on repeated sprint performance post-fatigue'. My dependent variable is sprint time (7 x 30 m sprints) and my independent variable is the condition (control, caffeine and placebo). I have already...
  15. J

    Proportion Z-score calculator

    Hi! I have a sample (of 30) who’s outcome was measured binomially as either YES/NO. The expected population should have entirely NO answers. I therefore want to calculate if there is a significant difference in the proportions between sample of 23/30 (23-YES, 7-NO) and the expected proportion of...
  16. 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...
  17. 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...
  18. 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...
  19. 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)...