Recent content by rclukey

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    Interaction Terms: Logistic Regression

    Dear forum, trying again... I would really like some advice on the proper construction and interpretation of a small experiment and analysis using Logistic Regression. I had a sample of 50 people evaluate three different products (X1) and generate a score (X2). Then they indicated how...
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    Logistic Regression: interpreting an interaction term

    Dear Forum, This topic has been covered a lot here and in other forums, but I have yet to find a clear answer to this particular problem. I'm trying to understand how to interpret the odds ratio of an interaction between a categorical variable with 6 levels (6 similar products) and a...
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    behavioral intent

    Dear Forum, I'm looking for advice on how to validate a measure of behavioral intent. here's a simplified example: let's say that I did a study on 5 products - I sampled 100 people and asked them to state how likely they were to purchase each product. Then, each of the products...
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    z-scores

    Dear Forum, I have a question regarding calculating z-scores. suppose I sample 20 people and ask them to rate on a 7-point scale how satisfied they are with X. (imagine that this method is perfectly valid and reliably for the sake of this example...) sample mean = 5.77. Previously I...
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    Survey Data for performance metrics

    Dear Stats Forum, I have a question about how to use subjective survey data in the development of design and performance targets for a product. I work in an engineering group that would like to incorporate user satisfaction data in the assessment of product targets in the early stages of...
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    Survival Analysis SPSS: Repeated Events

    Dear TalkStats Forum, Does anyone have experience using SPSS for survival analysis when there are repeated events? the good news is, I'm still in the "design" stage of the research, so it's not too late to dramatically change the approach. Here's the basic setup: We have 50...
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    Logistic Regression / Weight of Evidence Transformed Variables

    Hi Everyone, I'm looking for some help to interpret the output of logistic regression when using predictors that have been transformed and binned using the Weight of Evidence procedure. Specifically, how does one interpret a significant coefficient and corresponding odds ratio? For...
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    Fractional Factorial Design Question

    Does anyone have experience with using fractional factorial designs for psychological research? I'm new to DoE, and I have no guidance except the internet... not too helpful. Anyhow, I have a practical question about data collection and entry (e.g. minitab) The question is: if I have...
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    Experimental Design Problem for Engineering

    Dear TalkStats Forum, I have an experimental design problem for which I could use some guidance. I have a product where we are trying to determine the optimal values for 5 different variables, and which variables are significant in affecting the user's satisfaction. Unfortunately, I...