beginner

  1. DanaDana

    Mean of the residuals in Simple Linear Regression *Beginner Alert*

    Hey guys, First of all, I would like to apologize for the question I'm gonna ask regarding the fact, that I am absolute beginner in statistics. Currently I'm trying to test some hypotheses in Rstudio using Simple Linear Regression, as I am aware that before interpreting results of my model I...
  2. C

    Simple Set THeory/Probability Problem

    Hello all, I'm very new to statistics as well as this forum, so please bear with me. I've tried solving this for about 30 minutes now and I've made pretty much 0 progress on it. The question is: Suppose that evens A and C are mutually exclusive. P(not A)=0.7, P(CB)=0.4, what are the...
  3. M

    Beginner's question: Is profit/loss data always ratio in nature? How to treat it?

    Hello, I'm afraid this is another beginner's question. I've only recently grasped the fundamentals of linear and multiple linear regression and I still have the following nagging doubt. I'd like to analyse some sales data for the purpose of forecasting future performance. My dependent...
  4. Q

    Beginner questions: Clinical trial

    Hi there! I am a medical student working on my PhD, and I am analyzing some data for a meeting. Since we don't learn much about statistics (at least not here in Germany :D), I have some beginner questions and I would be extremely happy if you could help me. The first question is the most...
  5. B

    Statistical Analysis for Heart Monitors

    Hi everyone, I am an English person who's never taken statistics (yikes, right?). Well, now I'm working a job where I need some ideas of what kinds of statistical analysis might be used to make sure that medical devices (heart monitors in this case) are working properly. I'm writing a...
  6. Y

    Beginning and end of rainy season. How to?

    Hi all, This is a beginner's question, I apologize for that. I have taken Descriptive Statistics and I am on my why to Probability and later Inferential Statistics. But I have a burning question. No, this is not homework or an kind of assignment, but a confusion I cannot shake off. I...
  7. Z

    Beginner question: similairity between samples

    hello forum, at first i want to appologize for may be asking some simple straighforward question, because i don't have much background in statistics. let's say i have several hundreds records(islands), that are measured by certain variables (compactness of shape, elongation, fractal dimension...
  8. S

    Beginner Question- MANOVA error in R

    Hi, I have repeatedly tried to conduct a MANOVA in R but my output keeps returning "no error degrees of freedom". I have three plots each with multiple sample sites, with each sample site sampled 3 times (over 3years). I wish to compare the plots with each but also for differences in each plot...
  9. L

    iteration using a loop in R

    Hi, I have two vectors as follows: popd = vector(mode='numeric', 100) popr = vector(mode='numeric', 100) These represent the initial distribution within 2 populations. I want to define these e.g. popd[]=0.01 popr[]=0.01 These populations will then transform according to the following...
  10. L

    how to create a vector from function outputs

    Hi everyone, I'm a complete beginner with R and am trying to use it for my maths project, however I'm getting stuck with what I reckon are some quite elementary things, just because I've never used it before and am teaching myself. This is what I have so far and what I am doing: popr =...
  11. E

    Help with extracting a piece of information from a variable

    Hello everyone. I'm looking to extract a specific piece of one variable and create a new variable with just that piece of info. Specifically, I've got full addresses and I want just the zip code. Parsing doesn't work because the addresses are of varying lengths: Address...
  12. E

    Closing all tables

    Hey everyone, being a sloppy and unqualified SAS-user I sometimes open tables I created (VIEWTABLE) and then forget closing them before running my program again, which causes an error of course. Is there a command I could put at the beginning of my programs that closes all tables that are open...
  13. H

    Trying to use knn, basic. but I'm clueless

    Hi can someone please help me with this I don't know what's wrong and I went to my professor and he said he didn't know and that I should figure it out. so I need to use a dataset called wine at http://archive.ics.uci.edu/ml/datasets/wine and then to use the k-nearest neighbor classifier...
  14. E

    Absolute Beginners Question: Problem with importing csv file

    Hello everyone, I am just getting started on SAS, but cannot even get past the first step in my tutorial :( Excel-Import does not work, so i am trying to import a .csv file. It does import the data, the only problem is that instead of my dataset looking like this var1 var2 var3 1 1...
  15. C

    Newb Question - Chi-squared - I love numbers but theses stats are tripping me up

    I am look at results of a likert scale and trying to establish statistical significance of the difference in percentage of 'top box' scores. Since the frequency distribution of the likert scale is non-normal I figured categorizing the top box is the best test for this. I am pretty sure I need...
  16. 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...
  17. 8

    Don't know where to begin??

    I'm writing a paper for my political science class. I am at a stand still because I am a complete beginner when it comes to statistical analysis. And could really do with some help. Here is my predicament. I have three parameters which I have recorded. Two of which are simple true or false...