statistica

  1. P

    Need help with statistical theories

    Hello everyone, I am a student in environmental hydrogeology, I am working on an area of 10km2 (5x2km) and in the study area there are about 18 water points. I had to Selection 6 sampling points out of the 18 points and then carried out a multivariate statistical study with the 6 points. But...
  2. M

    [Statistica - Nested Anova] How to do a two-way nested anova?

    Hi, I'm trying to do a two-way nested anova in Statistica, but the results do not seen to be a two way model. In my study I need to compare if the abundances (of taxa) differ between my 5 sampling units (sites) considering 2 periods (spring and auttumn). So, I have 2 randon factors (site and...
  3. R

    Help in determining a proper statistical test an approach for research question

    Ik have a problem in determining the right statistical test for my research. First I will give some background information. I want to research the impact of IFRS(regulatory change) on audit fees(fees payed to external auditors). This change was mandatory in the year 2005. I will use several...
  4. J

    Statistica - marking catagorised case states by colour on a PCA projection

    Hi, I have used statistica to run a PCA analysis, and would like to colour code the 'projection of the cases' output. I have used the 'Case states' - 'Color or mark by category' tool, by right clicking on the case states in the spread sheet, to colour code my variables (I would like to...
  5. M

    STATISTICA | Statistica 12 Graphs Repeatedly Crash my Computer

    I just installed statistica version 12 yesterday evening. In trying it out, I discovered that any action I carried out in the graph menu led to my computer crashing immediately. It is not the case if I try the statistics or other menu. In order to trouble shoot the crashing problem, I decided to...
  6. C

    [Statistica] logistic regression

    Hi, I have been getting a bunch of errors with Statistica when trying to created a logistic regression model. I use the Generalized Linear/Non-linear tab then go to logit model. The problem I have is that after I load up my variables and try to make a forward stepwise model I get an...
  7. A

    [STATISTICA] - Software selection for basic statistical analysis and SEM

    Hello, everyone! I'm new to this forum and I am very excited about this opportunity to learn from experienced people here and (hopefully) share knowledge about statistical analysis. I'm a graduate student pursuing Ph.D. in Information Systems. My dissertation research involves using...
  8. S

    PCA using Statistica

    While trying to do PCA using Statistica, I am receiving the following error message: The percentage of valid cases (65.67%) for variable files is less than the required minimum percentage of valid cases (80.00%). The analysis stops. How to solve this issue? I have 40 variables which I...
  9. M

    [Statistica] Command for percentile / bootstrap

    I am trying to get 0.05percentiles (median 095 CI) out of the bootstrap procedure in Statistica. I found the following command for median of my population: > Use file name > Sample boot(perm number,number of samples)/ median confi = 0.95 > Cstatistics variables Can anyone suggest what...
  10. S

    mixed model nested ANOVA

    I have been trying to run a three factor ANOVA in Statistica 8.0. My experimental design leads to nested, random and non-random factors: Site fixed factor Treatment (site) fixed factor Month random factor I have been unable to work out how this...
  11. L

    How to calculate P-value in this context?

    A pupil can recite 30 words out of 100 wordlist (30%). After practice, he can recite 35 out of 110 wordlist (31%). If this is normal distribution, is the difference significant? What is the procedure of calculating P-value? Your help is appreciated.
  12. L

    How to calculate P value in significance test?

    I am a newbie in statistics. a question is: 30 out of 1200 students from a school got A grade in 2009. The number of students increaseed to 1500 this year. and 40 out of 1500 from the same school get A grade this year. How to calculate P value in significance test? What is the procedure...
  13. W

    [Statistica] - Some beginner's questions

    Hello everyone, I'm just starting with Statistica (using the latest version, 10), and I have a few questions: Is it possible to rename multiple variables? I have a spreadsheet that has variables that have random, meaningless names, and I would like to rename them according to a pattern...
  14. W

    [Statistica / Statgraphics] - Can grouped data be analyzed?

    I have many datasets consisting of grouped data -- no individual cases, only frequencies (# of cases) in each class (some open-ended upper classes). Can such data even be entered in Statistica or Statgraphics? Can it be analyzed? I can find no reference to grouped data in the help files of...