missing data

  1. T

    Missing Data - Scale Validation

    Hi everyone, I am working to validate a 10-item scale, 5-point Likert response format in a sample of 673. Trying to find a "happy medium" for all I've been hearing about what to do with missing data. I am primarily using SPSS. My adviser wants me to delete cases missing 3 or more items...
  2. S

    Vertical-Format longitudinal dataset: Fill in missing values for cases

    Hi all, I am running some growth curve analysis in SPSS. My data is in the vertical/stacked format. There are 6 entries for each person since we measures six points in time. HOWEVER, my model won't run because there is too much missing data. This is because for the demographic data...
  3. S

    missing data-doubly manova

    Hi all, I am supposed to perform doubly MANOVA on a dataset, which includes mising data. Now I wanna use EM imputation as a remedy for missing data. My question is, should I just use the dataset created by EM imputation and continue with that, and check the assumptions on that data, etc...
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    Little's MCAR test: mismatch in DF

    Hi, I have a question concerning degree of freedom in little ’s MCAR test. There seems to be a mismatch in the degree of freedom in the results of MCAR test. ->Little 's MCAR test: Chi-Square = 237,694, DF = 168, Sig. = ,000 However I suspected DF to be 245 because the data consists of...
  5. B

    MLE of multinomial distribution with missing values

    Hi, I am trying to solve a problem and the results I get seem counter-intuitive. We randomly throw n balls into an area partitioned into 3 bins b_1,b_2,b_3. The size of each bins is proportional to the probability the ball will fall in it. Let's call these probabilities p_1,p_2,p_3. This...
  6. B

    Deleting Variables with Missing Data in SPSS

    Is there a quick way to delete all variables that have no data in their columns?
  7. N

    Xbart Chart-Missing Data(correct sum) Question

    Good Morning, I'm in a business statistics course and I understand how to make a xbar and rchart in excel when all the data is available to me, but I just can't seem to figure out the problem below. Any help would be much appreciated! Thank you!! Here's the question: Using the data...
  8. D

    Missing data in clinical trials - HELP! Differential drop out plus ignoring questions

    Hi, I have a long format, repeated measures dataset. I have 19 variables (columns) - all representing individual questions on a 19 item scale. For my main analysis, I use the sum total of these 19 items across each row in the dataset (and a GEE analysis, with the sum total of the 19 items as...
  9. L

    Issue with missing data

    Hi all, I am working on a dataset that include 12K+ firm-level data for 30+ countries. I have both firm-level variables (each firm within country has unique data) and country-level variables (each firm belonging to a given country gets the same value). For some country-level variables, the...
  10. Lazar

    Export .csvout of SPSS

    HI All, For a training course I have to leave R and dabble in SPSS. I have not used the programme in sometimes and cannot remeber even some very basic stuff. Basically I need to export an SPSS file to a .csv file in which there are no headings, no string variables and missing are...
  11. B

    Factor analysis with categorical variables containing missing values

    Hello, I am trying to make a factor analysis with 32 categorical variables. They can be ordered and found from a questionnaire that answer options. Different questions had different options. The options were coded as 1,2,3,4,5 etc. So, each number representing a category for a question is...
  12. A

    Replacing missing data with EM

    Hello everyone, For my undergraduate dissertation in Psychology I have conducted research testing the executive function (EF) skills of 40 children, gaining five EF scores. Several children did not complete all the tests, so I have some missing data (13.75% of values). I have been browsing...
  13. R

    Missing data.......Help needed!

    So I'm handling a database that uses the total sum of 41 variables as a measure. I created a new variable with the syntax command "compute" sum= 1+2+....+41. But when a particular individual has even 1 answer with missing data I end up with missing data in the sum computed variable (makes...
  14. R

    comparing percentage when without knowing n? what test?

    I'm trying to do a meta analysis of some poll results and though I know the sample size in general, if I'm comparing the reported results and they say things like "78% of Toyota owners like baseball" but they don't say which percentage of people overall were Toyota owners, can I still test for...