1. I

    Need help with my thesis (correlation analysis)

    Hi all! I am new to statistics (self-taught since I need it for my thesis) and I have a question that I haven't been able to find an answer to yet. For my thesis I want to find out whether there is any relationship between how students and their teachers answer a likert scale questionnaire...
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    Relationship between a variable with categories and a variable with numbers?

    In SPSS, is there a way to find out if there is a siginificant relationship between symptoms (on a scale from 0-3, with 3 = the worst) and hospital stay ("yes" or "no") are related?
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    New free android application for common statistical analyses

    AnalyStat is a free android app that may help u quickly analyse your experiment results.
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    Which tests to use? ANOVA?

    Hi, I haven't done statistics in just over a year so trying to read through old notes and feeling a bit stuck! I'm running an experiment looking at pitch discrimination in both isolated notes and melodies, comparing both musicians and non musicians. 1) measuring pitch: should I be using...
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    Interpretation of a my results

    I have some identities that are distributed in a 2D space. Each identity has the properties X, Y, latitude, and longitude. Each dataset on average has 75 of these identities. For a particular dataset, when I plot X as a function of Y, I get no correlation. When I group the identities (say into...
  6. C

    "Exceptions" to a Correlation

    In the course of explaining to people that "exceptions," meaning examples running counter to the trend, do not disprove claims that there's a correlation between two variables, I came up with the idea of using a link to this correlation simulator, which generates a scatter diagram for each run...
  7. S

    Compare correlation coefficients is Trivial?

    Hi everyone, my problem is relatively simple, but trivial. I've already read some topics about that, but I really need straightforward answers and/or opinions. I have data divided by one fixed effect (Emotion, with 2 levels: negative and neutral), and I have a covariate (reaction time) for...
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    "Sort" output of various tests

    Hi, following situation: Assume, I have a product that is manufactured in i steps. For each of these steps, a tool set is available with j tools. When the product is finished, k parameters are measured. In general, parameters k are not normally distributed. I now regularly run some...
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    Analysing multiple group scores on likert scale

    Hi all, Long-time reader, first time poster here. Apologies for the slightly lengthy post. I'm just wanting a bit of advice for something i'm working on at work. I have data from my organisation on attitudes towards change and change management. 3 questions / statements were asked of...
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    I was wondering if there is a way to get the percent chance a value will increase using the correlation coefficient. Example, I have to columns of data in excel, they have a very low correlation of .06. I was wondering if my value in column A increase, what is the percent chance the value...
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    Generating random data from correlations

    (Background: I haven't studied statistics, just picked up various things). Say I have a list of personality traits: courage, materialism, compassion and so on. I interview some people and assign a rating from -10 to +10 to each trait for each person, then I find the correlation between each...
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    Time series Analysis - VAR or VECM

    I have 4 time series.One of them is stationary and rest of them are not.I need to find relation between them.I will use AIC to decide lag length.Should I use VAR or VECM to find relation between them? Will VAR or VECM give me relation in terms of equation which can be used for forecasting? Do I...
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    Help with correlation!!

    Hello! From the attached image I need to know: 1) Which graph shows a positive correlation? 2) Which graph shows the weakest correlation? 3) Which one of these correlation coefficients best represent graph 1: a) r= .80 b) r= .43 c) r= .12 d) r= -3.9
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    Predicting Percentile Rank

    Hello. I'm going to type out the question, run the answers I've gotten so far by you, and then ask about what I'm having issues with. Question: In a large statistics class the correlation between midterm scores and final scores is r = .5 every term. The scatter diagrams are football shaped...
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    Correct Procedure for analysis of Drivers

    Hello, I have some survey data which shows an effort score for interacting with a business. I am working in a programme of work tasked to reduce that effort. I want to understand (from what's available in the survey data set) what are the drivers of that effort score. This will help us...
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    correlation coefficient

    I have two columns of data that I ran a CORREL function on in Excel, which showed less than desired results. However when breaking the columns down, some sections of it were very strong, maybe even better than desired. But the data columns are long, so it's cumbersome to break them down looking...
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    Puzzled by Correlation

    This is a real problem although I'm using a made-up statistic (# of apples) for this. Say I am interested in how many apples people eat in a year. This varies by many factors. First I look at the country difference (the US vs. Canada). From historical data of the average number of apples...
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    Incorporating correlation between parameters using variation-covariance matrix

    Hi all, My colleagues and I are working on a project (i.e., health economics model) where we have fitted parametric curves (using Weibull, Exponential, Gompertz, Log-logistic, Log-normal, and Gamma distributions) to Kaplan-Meier data. In the project, we have estimated various survival curves...
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    Positive correlations to dependent variable, but negative coefficients

    First of all, sorry for the huge pictures, but I'm in desperate need of some input and help on the results following a study. I'm trying to interpret the results from my study, but I can't quite figure out what causes some of the positive correlations to turn into negative coefficients in the...
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    I'm working on a statistical model and I need some help. The question may be simple, but I need accuracy on the answer. If A is correlated with B, is A/B a circular function or a constant? Thus, I can't use A/B as another variable (similar as the principle of colinearity on multiple...