significance

  1. C

    Moderation Analysis through Process by Andrew Hayes and SPSS regression analysis

    Hello all, I need help analyzing some data for a moderation analysis. I have a continuous variable (predictor), Exhaustion, a continuous outcome, "Social Loafing" (coded 1, work alone, 2, work in a pair, or 3, work in a group--it's really an ordinal variable), and a continuous variable...
  2. F

    Significance between samples

    I am not an expert user when it comes to SPSS so maybe this is more than I can handle. Here is the situation: I have two products I am comparing, Product A and Product B. I use the typical 7-point scale of Strongly Dislike (1) to Strongly Like (7) with Neither Like Nor Dislike (4). I recoded...
  3. G

    proportion inference analysis

    Hi. I have data on 1027 potential donors to a non-profit organization. I want to see if our online ads have impacted their donation rates. The people who sent me the data have a record for each of the 1027. They included a "sample weight" column which indexes the demographics columns. So...
  4. M

    Logistic regression: trouble finding out which variables are significant

    Hi, I'm using logistic regression to analyse a dataset on managerial decision making. Managers have made decisions to fire 2 employees out of a group of 8 from a fictional company used in the research setup. This data is coded binominally (0=chosen to retain, 1 = fired). To find out what...
  5. P

    interpreting ModMed results

    Can we interpret ModMed results if our indirect effect is significant (Class Intervals don't include zero) but our interactions are not significant (CI includes zero)? Please may you guide me to an article which I can quote w.r.t your response? Thanks in advance!
  6. H

    Significance when there are no occurrences in one of the variables?

    Hi guys! We've been studying the incidence of pigs mounting each other in a group of pigs containing entire male pigs, gilts and castrates and in a group of pigs of only gilts and castrates. The incidence of mounting behaviour was 146 in the group with entire male pigs, but there were no...
  7. S

    Need simple help in a hurry!!!

    Hello, I'm using SPSS 19 where i need to calculate the significent value between groups. I really need help becouse i can't figure it out by myself!! The situation: I have only numbers: 30 results is the total population 2 results are excluded 25 results are good 2 results are...
  8. E

    [R] Methods to determine reliability of measurements using median and median absolute

    I have been looking for a solution to this problem for days, so I hope you can help me. I have several datasets containing hundreds of variables, measured at the same time point and with the same method. Some of these variables have been measured more often and assume consistent values. Some...
  9. M

    Logistic regression: dummy variables not significant, what next?

    Hi, I'm running a logistic regression to try a predict landslides in SPSS using a categorical variable (vegetation type) with 6 possible values. In the results, the variable as a whole is significant although a couple of the dummy variables have p-values > 0.05 and thus are not significant...
  10. Y

    Indicate significant differences between two clustered bars

    Hello, I'm trying to add line and star annotation in a clustered bar chart, in order to indicate significant difference between two groups, similar to this: Example in MATLAB Can anyone help me, how can it be done in SPSS?
  11. G

    Manova not significant, some Anova tests are. Are they valid?

    I"m doing my dissertation on recommendations made during a diagnostic procedure, so I have 19 dependent variables based on 8 diagnosis levels. When I ran SPSS it was not significant, does that mean that none of the relationships are significant? or could some of the individual Anova tests that...
  12. B

    Correlation Across Time Help?

    Hi I'm a bit lost as to how to calculate the correlation between two groups of numbers across time. I'd like to see if one group, taken from the start of the time frame, has a significant difference or similarity to another group, which represents the remainder of the time. This may be a...
  13. I

    2-way ANOVA and the post tests

    Hi everyone :) I was wondering if you could help me with a question which should be simple... but the more I am trying to figure it out, the more confused I get :confused: I am trying to see the effect of a treatment (so I have a control and treated group) at different time points before and...
  14. 2

    Why is my model significant if neither of its parts are?

    There are two parts that make up my model: 1. Survey 1 memory accuracy (% correct)- Not significant 2. Survey 2 memory accuracy (% correct)-Not significant My model (total memory accuracy) combines results from both surveys and shows that the effect of mental exercises on memory accuracy...
  15. M

    Help with difference between two means

    Dear statisticians, I have four groups of values, A, B, C and D. I'd like to find out if the difference between groups A and B is significantly different to the difference between groups C and D. For example: Group A: [30, 21, 22, 26]; mean 24.75; stdev 4.11 Group B: [11, 16, 13, 12]...
  16. D

    Insignificant marginal effects of a significant interaction term?

    Is it possible that a highly significant interaction term, does not have significant marginal effects at various levels of the primary explanatory variable? Regards David
  17. T

    Effect of Color on Taste - Statistical Significance

    Hi, for my 8th grade science fair project, I am testing to see if color affects one’s perception of taste. Specifically, I tricked test subjects into thinking that they were tasting different manufacturers’ chips and telling me which one tasted best, but in reality all the chips were the same...
  18. V

    significant variable within a non-significant model/block in hierarchical regression

    Greetings. I'm conducting a hierarchical (aka sequential) regression analysis with four blocks of variables. Block 1 consists of 5 covariates. Sex is one of these covariates, with the following breakdown: males (n = 213), females (15). Block 1 is not significant (R square = .04), though the...
  19. G

    Identify the causes for a phenomenon

    Hi everyone. I would like to investigate the relationship of different factors to a phenomenon. Saying I have traffic accidents (1 or 0) with related data at the same time and place e.g. traffic condition, weather, speed deviation, time-of-the-day, etc. How can I tell if those factors are...
  20. J

    Overcoming small dataset anomalies in genetic algorithm

    Hello Talk Stats, this is my first post on this forum, interestingly typing in modeling forum in google took me to a series of websites that was not my desired search result. So I am currently making my 6th version of a model designed to predict the likelihood of of a particular medical...