spss

  1. V

    Loops in SPSS - creating new variable based on multiple loops??

    Hi, I am looking for help! Maybe someone here knows the answer? I want to make a new variable (in SPSS) Date_flare_FU (Date of a disease flare during follow up). This variable will be based on 12 follow up visits (Date_T1 tm Date_T12 -> date), during which disease activity is assessed...
  2. L

    Normality is not assumed ( kolmogorov-smirnov sig level= 0.000)

    Currently, I'm doing a research using Beck Depression Inventory on 340 respondents from my university. Before I apply any parametric tests, I tested the normality first, however the normality is not assumed. So, I wondering is the data really not normal or the way I analyze it have problem ...
  3. L

    System missing value

    I have a data from 340 respondents that I key into SPSS. But the problem is the result of descriptive statistics show that the system have one missing data eventhough there is no data missing ( i filled up every single row and column). And SPSS say the total sample size is 341 instead of 340...
  4. N

    Recoding/transforming problem

    Hello everyone, As a very begginer in SPSS I would ask you for help with some transformation from table A into table B. I have to recode values of "brand" variable into columns and make 0-1 variables. I can do it in this particular case in this simple way: compute GREEN_CARE=0. compute...
  5. L

    Is cronbach alpha applicable ?

    Recently, I'm doing a pilot study for my questionnaires however I got 0.05 for my cronbach alpha. My questionnaires consist of two part : 1. Demographical parts ( also include things like likert scale) 2. BDI inventory ( Beck Depression Inventory) The problem is the result of SPSS told me...
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    Questionnaire - Guidance needed.

    Hello, I am currently refreshing my knowledge about statistics and I would appreciate if someone could provide me some guidance on how to look at my current data set. I distributed a questionnaire asking participants: - whether they are working for a governmental institution, a corporation...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
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    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...
  14. 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...
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    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...
  16. 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...
  17. 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...
  18. 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...
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    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???