statistical analysis

  1. Y

    Help on stats for research model needed

    I am in need of a quick statistical advice for a study I planned, and I hope you can help me a bit with it. I'd really appreciate your expertise. The research is on nudging (subtle psychological manipulations). My model is attached to the post. The model looks kind of funny, so let me...
  2. S

    Mann Whitney U test and Spearman test using GraphPad prism 6 interpretation

    I have analyzed two biological sample (Soil 1 and Soil 2) by Mann-Whitney U test and Spearman test using GraphPad Prism 6 software. I got following result For Mann-Whitney test Table Analyzed One-way ANOVA data Column B Soil 2 vs. vs. Column A Soil 1 Mann Whitney test P value < 0.0001 Exact...
  3. S

    What statistical analysis to use for a ordinal scale questionnaire?

    Dear Experts, Im a noob when it comes to statistics. So please pardon my lack of knowledge in this post. I need to do a statistical analysis on a set of questionnaires. There are 3 sets of questionnaires for 3 different populations (Human Resource Reps, Managers, Employees). My hypothesis...
  4. J

    One-way ANOVA and planned comparisons - HELP!

    Hi all, I'm currently running a Psychology experiment: the effect of background music on memory and mood. I will be using SPSS to conduct two one-way ANOVAs (music + mood / music + memory), w/ planned comparisons. However, I also want to see the effect of mood on memory but I don't know how...
  5. S

    statistical analyis of weather data

    Hello, I made ambient temperature and relative humidity measurements using a sensor, next to a highly accurate meteorological station and i want to test the accuracy of my data in respect to the meteorological station (assumed as the "true" value). Practically, I have 2 sets of data, one...
  6. M

    Benchmarking and Statistical Difference

    Hey everyone, I have a few issues and would really appreciate your help :) Thank you very much ! So here it goes : I have two levels ( A and B ), in different fiscal years ( 2007 - 2011 ) and approximately 15 variables. I would like to calculate the mean, variance, kurtosis and...
  7. Eaners

    Choosing an appropriate test: MANOVA? ANCOVA? Something else?

    I am performing a "dry run" statistical analysis on my dissertation data pretest, and I'm looking for a little guidance regarding the specific analyses I need to perform. I have three primary variables: Environment. Categorical, 1 of 3 conditions. Independent, assigned by experimenter...
  8. C

    interpretation of intercept and regression coefficient

    This is a multiple linear regression problem with two independent variables. dependent: blood pressure independent: stress and age The raw regression coefficients for x1(stress) and x2(age) are 1.373(stress) and 0.581(age) The intercept is (0,68.969) I need to interpret the values I...
  9. S

    4 variables, 2 surveys.. how to link? please help!

    hi :wave: i have 2 surveys. The data is collected from both managers and subordinates, the first one has just one variable (moderator) and the 2nd has 3 variables (mediator, independent variable and dependent variable ) i have 1 independent variable , 1 moderator, 1 mediator and 1 outcome...
  10. A

    How do you define a statistical way to ensure that the worst case are captured??

    I need a recommendation which addresses the variability of results. There is variability associated with these results. What I specifically need is help to define a statistical way to ensure that the worst case is captured, which can then be used in future testing and we can be sure that we...
  11. S

    How can confirm the data in the table is statistically significant?

    Hi, Please find the table document. https://www.dropbox.com/s/s22obnlizefeejj/stat%20check.xlsx Numbers in bracket refers to number incidents in a particular stages occurred over months in a year under each category C1, C2, C3. Total number of INCIDENCE is 240. January month incidences (142 +...
  12. R

    Weighted Kappas...please help!

    Hello! I've looked all over regarding how to do this but am still coming up short. Please help! I have 16 data points. I have provided the weights!! Please help! This is huge!!!! Data Point Weight Component 1 .33 A 2 .66...
  13. O

    Making sense of the data...Data analysis

    Dear Experts, I have data for a 12 months study done on 2 wastewater (Plant A and Plant B—Final Effluent and Discharge Point) treatment plants. Physiochemical (13 parameters tested) and Microbiological(bacterial) data were collected. Also there is the recommended standards against which all...
  14. M

    Time series analysis with external events in R

    I have a time series of daily website visitors and several different marketing events (some continuous for several days). I would like to determine what impact did those marketing events have on website visitors dynamics. What approach would you suggest in terms of analysis ? I'm working with R...
  15. R

    How to create an unbiased fit to the data (Keyboard log data for each user)

    Hi all , So I have a very simple distribution of events (eg user keyboard log for five employees). Now if suppose I consider frequency of each key pressed for a single user, and for all users. And then suppose I want to see what distribution this data follows ( without any bias toward any...
  16. M

    Which test to use

    Hi all I am a language teacher, and, like many of them, I am unaware of the test I should you for statistical analysis of the data available with me. In fact, I want to see which of the skills my students are good at, and which one they are poor in. I have data for five skills, i.e. Writing...
  17. L

    Hierarchical Regression Analysis - is this the correct technique

    I am proposing a study to find out whether cognitive restraint, disinhibition and hunger predict weight gain in pregnancy. However, I know from previous research that this effect differs depending on BMI category. Am I correct in saying I could use a hierarchical regression analysis, where...
  18. A

    How to analyze survey data with three levels of data in SAS?

    We analyze data from a European survey (34 countries ) for quality of life , the sampling procedure is described as a " multi-stage stratified and clustured sampling design " . Our outcome variable is binary. There are three levels of data to be taken into account (individuals, regions...
  19. N

    Tomographic map of 3D data with a dimension described by probability distribution

    I have a three dimensional data set. Two first components are the exact values of(X,Y) and for the third dimension I have a probability attached to each point for each given value of z between (0,1.5). for example P(x0,y0,z0)=0.24 and the probability is not necessarily Gaussian, it can be...
  20. L

    statistical Analaysis? NEED HELP... URGENT!!!

    I am working using secondary data that was originally collected for another purpose. The data is from a teen pregnancy program among Latino youth. The program had a control group and an intervention group and collected baseline and follow up data from both control and intervention. the...