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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. im a newbie and i need some help with regression :(

    kayy... masters student here :wave: im so lost in my statistical analysis and my supervisor isn't really helpful :( for my model i have 3...

    Started by jkerr1‎, 01-20-2017 08:01 AM
    • Replies: 1
    • Views: 1,980
    01-20-2017, 12:30 PM Go to last post
  2. How to investigate a curvilinear relationship? (power curve?)

    Hi there, Can anyone tell me how to explore this relationship on SPSS using a regression analysis? I have been advised that this relationship...

    Started by crook‎, 01-19-2017 01:01 PM
    • Replies: 13
    • Views: 2,322
    01-19-2017, 11:57 PM Go to last post
  3. Deriving further values from regression coefficients

    Hi, Iím hoping someone can help me. Iím trying to derive another value from the coefficients of two regression equations. I have 2 regression...

    Started by Noble‎, 01-19-2017 09:43 AM
    cauchy, coefficients, regression
    • Replies: 0
    • Views: 1,393
    01-19-2017, 09:43 AM Go to last post
  4. Math Help: How to Calculate Weights for Multiplicative Model with Dummy Variables

    Hi Everyone, My question is how do I calculate weights for Y=W1X1*W2X2*WNXN where N is the number of independent variables. I could use...

    Started by CharlieBombay‎, 01-18-2017 11:52 AM
    coefficients, math, predictive model
    • Replies: 1
    • Views: 1,843
    01-18-2017, 04:51 PM Go to last post
  5. How can this be true [linear versus logistic regression]

    This comes from a government study that was used to generate something of great importance, funding and related factors for a major government...

    Started by noetsi‎, 01-07-2017 01:31 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 4,635
    01-15-2017, 02:51 PM Go to last post
  6. Can data be classified as count data?

    Hi, I have a dataset spanning two years which consists of individuals entering some process. Once they have entered this process I want to predict...

    Started by Mkkl‎, 01-15-2017 05:25 AM
    count data, negative binomial, poisson
    • Replies: 2
    • Views: 1,918
    01-15-2017, 08:38 AM Go to last post
  7. How to Fit polynomial regression by bootstrap and establishing IC of each parameters

    #Hi everybody and excuse me for my bad english for this request on R. #here parameter of an hypothetical interval : ...

    Started by philippe‎, 01-13-2017 08:28 PM
    bootstrap, regression analysis, regression coefficent, routine r
    • Replies: 0
    • Views: 1,408
    01-13-2017, 08:28 PM Go to last post
  8. growth curve models

    hi all, suppose my outcome is total yearly savings ($). i want to use growth curve models to see how 4 different groups change in their savings...

    Started by leonedelman‎, 01-13-2017 06:41 AM
    growth curve models
    • Replies: 0
    • Views: 1,717
    01-13-2017, 06:41 AM Go to last post
  9. Random slopes

    Dear experts, When should I include random slopes in my non-linear mixed effects model? Is it solely when it results in a better Log...

    Started by Palermo‎, 01-12-2017 10:49 PM
    • Replies: 0
    • Views: 1,437
    01-12-2017, 10:49 PM Go to last post
  10. Checking temporal dependency

    Hi guys, this is my problem: I have performed some experimental tests (tomographies) on 40 samples. These samples are made by four different...

    Started by dado92‎, 01-11-2017 12:10 PM
    temporal dependency
    • Replies: 2
    • Views: 1,857
    01-11-2017, 01:12 PM Go to last post
  11. Dealing with temporal autocorrelation

    Hi, assume we have a measured value for each year from 1990-210, and we want to estimate a linear trend. Now there is a problem of...

    Started by mmercker‎, 01-10-2017 03:22 AM
    additive, autocorrelation, gam, regression, trend
    • Replies: 2
    • Views: 2,001
    01-10-2017, 11:39 AM Go to last post
  12. Question Mediation Output with Process

    Hi, I am investigating a variable for its effect as a mediator with SPSS and Process but I have problems interpreting the output. First I...

    Started by StatStud‎, 01-10-2017 08:08 AM
    mediation, process
    • Replies: 0
    • Views: 2,385
    01-10-2017, 08:08 AM Go to last post
  13. What is spatial regression?

    This is the first time I have heard of this technique . They are concerned with what they call spatial issues, for example how rural versus urban...

    Started by noetsi‎, 01-09-2017 09:47 AM
    • Replies: 6
    • Views: 1,918
    01-09-2017, 02:41 PM Go to last post
  14. Statistical inference.

    Hi there, I would like to ask a couple of basic questions: 1. What is the difference between estimation and hypothesis testing? I mean are they...

    Started by Abubaker‎, 01-08-2017 06:25 AM
    hypothesis testing, model selection, modeling techniques, statistical inference
    • Replies: 1
    • Views: 1,893
    01-09-2017, 02:01 PM Go to last post
  15. Individual versus aggregate regression

    What is the difference between doing regression at an individual versus a aggregate level This is an example of what I am talking about for...

    Started by noetsi‎, 01-07-2017 02:09 PM
    • Replies: 0
    • Views: 1,911
    01-07-2017, 02:09 PM Go to last post
  16. I want to learn to create ARX, ARMAX, Box-Jenkins and Output-Error

    Hello. I'm am a control engineer and I want to upgrade my skills in simulation of dynamic physical systems. Normaly I describe my physical system...

    Started by Volvo742‎, 01-06-2017 08:22 AM
    • Replies: 8
    • Views: 2,431
    01-07-2017, 12:43 PM Go to last post
  17. 'e' in expected values in Poisson

    Using this example (see below) could someone please tell me what the 'e' symbol stands for and how one would work out the expected values manually. ...

    Started by sarahharding‎, 01-05-2017 11:44 AM
    expected values, poisson distribution, poisson regression, symbols
    • Replies: 1
    • Views: 1,868
    01-05-2017, 02:43 PM Go to last post
  18. Question Data input- ordered logistic regression

    Hello, I am trying to analyze the relationship between mode familiarity and Technology & demographic characteristics. So I have an ordinal dependent...

    Started by paranjyoti‎, 01-05-2017 09:09 AM
    data analysis, logistic regression, regression analysis, spss
    • Replies: 0
    • Views: 1,354
    01-05-2017, 09:09 AM Go to last post
  19. Regression analysis in R - which variables to include?

    Hi all, I am doing causal research between the relation between a dependent variable Y which consists of 4 phases (so 4 dependent variables Y1,...

    Started by koot6133‎, 01-05-2017 07:45 AM
    correlation, multiple regression, selection of variables
    • Replies: 0
    • Views: 1,573
    01-05-2017, 07:45 AM Go to last post
  20. Is Using an Explanatory Variable that Defines My X-Y Pairs Correct ??

    Hello My question is basic I guess: My data looks like this: obs date Y X 1 1/1/2010 5.6 3 2 1/2/2010 7.9 5 3 ...

    Started by Meytar‎, 01-03-2017 02:45 PM
    • Replies: 0
    • Views: 1,918
    01-03-2017, 02:45 PM Go to last post
  21. Cool weird difference between measures of Goodness-of-Fit ??

    Dear stats friends I have run an ordinal regression in SPSS on 700 subjects I have data on an ordinal DV: heart disease score between 0 and 3. ...

    Started by wulfgar‎, 12-30-2016 12:38 PM
    • Replies: 2
    • Views: 2,594
    12-30-2016, 12:45 PM Go to last post
  22. Complicated Research quesiton

    Im looking to do some research in the social science field and I have to do a statistical analysis of a complicated set of self report measures. I'd...

    Started by danmpc‎, 12-28-2016 06:52 AM
    • Replies: 8
    • Views: 2,699
    12-30-2016, 12:33 PM Go to last post
  23. Post Calculating the multiple regression function via canonical correlation analysis

    I've got one dependent variable and two independent variables. I need to calculate the multiple regression function via canonical correlation...

    Started by floflo‎, 12-29-2016 02:35 PM
    canonical, canonical analysis, eigenvalue, multiple regression, svd
    • Replies: 0
    • Views: 1,927
    12-29-2016, 02:35 PM Go to last post
  24. ANOVA - Does Welch's test assume homogeneity of variances, or not?

    In other words, will it return a much smaller standard error when variance are unequal than Fisher's? Or is it not concerned with variance?

    Started by bikingman‎, 12-28-2016 04:02 PM
    anova
    • Replies: 3
    • Views: 1,872
    12-28-2016, 09:46 PM Go to last post
  25. General linear model and residuals

    Hi, i'm using SPSS for analysis of my data using general linear model with 3 independet factors (2 levels each) and one independent ordinal factor (4...

    Started by igsimoes‎, 12-26-2016 12:55 PM
    • Replies: 0
    • Views: 1,958
    12-26-2016, 12:55 PM Go to last post
  26. How to Compare B Coefficients within and between models in R?

    Hello people, I am new to this forum and it would be great if some experienced people could help met out. I would like to know what the...

    Started by KevinAdam‎, 12-24-2016 05:00 PM
    • Replies: 1
    • Views: 2,410
    12-25-2016, 04:16 AM Go to last post
  27. Newbie needs some help with his model interpretation

    Hello, i am quite new in the world of statistical problems :) I have read some lecture notes and books to solve my current problem, but i am note...

    Started by R_Newcomer‎, 12-24-2016 09:52 AM
    • Replies: 0
    • Views: 2,191
    12-24-2016, 09:52 AM Go to last post
  28. Regression on estimated variables

    I'm making a two-step analysis for my data. First Step: I've collected inflation and interest rate data for 25 countries in a monthly frequency...

    Started by glima‎, 12-22-2016 08:18 AM
    measurement error, regression, standard errors
    • Replies: 2
    • Views: 2,083
    12-23-2016, 09:52 AM Go to last post
  29. 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...

    Started by MrPink‎, 12-21-2016 08:43 AM
    beginner, lineal model, ratio
    • Replies: 3
    • Views: 2,074
    12-21-2016, 06:06 PM Go to last post
  30. Random intercept only for 1 subgroup in lmer

    Dear all, suppose I have a case study with 3 different populations, A, B and C. For all groups I have data on, e.g. body mass, length and sex of a...

    Started by Luke‎, 12-21-2016 03:30 AM
    • Replies: 2
    • Views: 2,231
    12-21-2016, 12:12 PM Go to last post
  31. Calculating probabilities from logit parameters estimated with effect coding

    Hello, I calculated this multinomial logit model using an effect coding (-1 0 1). The variable edu3 is the education level (3 categories), sex has...

    Started by Demographer‎, 12-21-2016 03:39 AM
    • Replies: 0
    • Views: 1,660
    12-21-2016, 03:39 AM Go to last post
  32. moderation in SPSS vs. PROCESS

    Hi. I did mediation and moderation analysis of one model in 2 programs: SPSS and PROCESS (macro). Mediation was the same, but moderation was...

    Started by Ginny Joyce‎, 10-15-2016 08:14 AM
    moderation, process, spss
    • Replies: 2
    • Views: 2,983
    12-19-2016, 08:35 AM Go to last post
  33. 3-way ANOVA for paired groups and repeated measures or a GEE

    Hi! I need help for data analysis of my masters.I work with awake rats in pharmacology experiments. In my experiment I have some groups of treatment...

    Started by igsimoes‎, 12-17-2016 07:26 AM
    • Replies: 2
    • Views: 1,813
    12-18-2016, 11:01 AM Go to last post
  34. When to use Augmented Dickey Fuller test vs Dickey Fuller Test - Time series

    Checking a variable for I(1) process, when should i use a ADF vs DF test?

    Started by maasi007‎, 12-17-2016 10:01 AM
    arma, dickey fuller augmented, dickey fuller test, time series, time series analysis
    • Replies: 1
    • Views: 2,059
    12-17-2016, 12:30 PM Go to last post
  35. Trying to think of alternative methods to approaching my model for dynamic pricing

    Right now i run a pricing experiment where 25%of users get one of 4 random prices. After collecting sufficient data, I split my data into training...

    Started by bball3212‎, 12-16-2016 10:37 AM
    • Replies: 0
    • Views: 1,594
    12-16-2016, 10:37 AM Go to last post
  36. help in model

    I have a data set like that ID Wight age sex season region response 1 60 40 1 4 2 1000 2 65 ...

    Started by mosthamed‎, 12-16-2016 05:35 AM
    • Replies: 1
    • Views: 1,876
    12-16-2016, 09:00 AM Go to last post
  37. Repeated Measures model with Covariates

    Hi Everyone, i am struggling with finding a good way to analyze a dataset. The design is this: I have 25(n) subjects, all of them are tested in an...

    Started by cecilia‎, 12-15-2016 04:49 AM
    categorical, covariate, model, multiple regression, repeated measures
    • Replies: 1
    • Views: 2,130
    12-16-2016, 02:23 AM Go to last post
  38. How to calculate residual covariance in R

    I know it is may be a silly question but I am looking for an answer if I fitted a linear model c<- lm (y~ a+ b) I need to get the residual...

    Started by mosthamed‎, 12-15-2016 06:45 AM
    linear model
    • Replies: 1
    • Views: 1,954
    12-16-2016, 02:18 AM Go to last post
  39. Linear Regression - Beginner Need Help

    Hello everyone, I have a simple exercise to do about linear regressions and models but I have a few doubts. The exercise gives you 2 vectors(let's...

    Started by dieselonthecouch‎, 12-14-2016 10:38 AM
    • Replies: 4
    • Views: 2,310
    12-14-2016, 03:04 PM Go to last post
  40. Advice on OLS analysis

    Hello Everyone, I’m writing a paper on the relationship between weather on daily public bike share system usage. I’m looking for a bit of advice...

    Started by bikingman‎, 12-14-2016 12:59 PM
    ordinary least squares
    • Replies: 0
    • Views: 1,442
    12-14-2016, 12:59 PM Go to last post
  41. Question Adaptive Lasso and CrossValidation for SNV selection

    Hello everyone, I have available 17 000 variables (SNV frequencies, a certain number of zeros) for 40 patients. Each patient is represented by its...

    Started by CorentinR‎, 12-13-2016 07:29 AM
    adaptive-lasso, cross-validation, high throughput, variable selection
    • Replies: 3
    • Views: 2,209
    12-13-2016, 11:51 AM Go to last post
  42. SEM versus multiple regression?

    Hello. I have a within-subjects longitudinal design with two time points. There are two DVs and 3 IVs. All are measured at both time points. I used a...

    Started by morlei‎, 12-13-2016 10:27 AM
    • Replies: 1
    • Views: 1,694
    12-13-2016, 10:41 AM Go to last post
  43. Mixed effects using nlme in R

    If I include an interaction (time*score) in my model the main effect (score) is significant. However, if I remove the covariate (time), the effect...

    Started by Palermo‎, 12-05-2016 05:55 PM
    • Replies: 3
    • Views: 2,264
    12-13-2016, 03:44 AM Go to last post
  44. mixed effects influence of interaction

    Can someone confirm that the following are correct. I'm trying to model both the random intercept and random intercept/slope models. Random...

    Started by Palermo‎, 12-12-2016 11:15 PM
    • Replies: 2
    • Views: 1,883
    12-13-2016, 03:25 AM Go to last post
  45. Logistic Regression Output

    Hey All, Can someone help me make sense of this Minitab output? A few questions I had are: What does the odds ratio statistic mean? what does...

    Started by MaxPowers‎, 12-11-2016 11:16 PM
    • Replies: 3
    • Views: 2,580
    12-13-2016, 01:44 AM Go to last post
  46. Poverty analysis and multiple linear regression

    Hi. I have a dataset and I intend to use multiple linear regression analysis with excel since the dataset isn't that massive in volume, just about...

    Started by auroraborealis‎, 12-12-2016 07:37 AM
    regression analysis
    • Replies: 0
    • Views: 1,940
    12-12-2016, 07:37 AM Go to last post
  47. Urgent: data format in regression analyses

    Hi all, I'm suffering a lit bit with some data I have to analyse (my first time...) and I have many doubts. We manipulated 3 IVs that were shown...

    Started by Phoolan_D‎, 12-10-2016 11:13 PM
    • Replies: 0
    • Views: 1,648
    12-10-2016, 11:13 PM Go to last post
  48. Regression with two data sets?

    I have two data sets. Set 1 contains daily flights and delay data: Flight Date Carrier Departure Delay, ranging from 0 to 1650 minutes. ...

    Started by kdsan‎, 11-01-2016 09:49 PM
    • Replies: 1
    • Views: 1,817
    12-10-2016, 10:35 PM Go to last post
  49. Lightbulb Need help with data for regression analysis

    I have extracted the following values from Draper and Smith (1998) for independent variable X, dependent variable Y for regression analysis: ...

    Started by Johsins69‎, 11-22-2016 12:17 PM
    • Replies: 2
    • Views: 2,213
    12-10-2016, 10:09 PM Go to last post
  50. LinearRegressionQuestions

    Hello, Can someone please help with Question 1.3 onwards in the attached file. Thanks, AJ

    Started by analyticsjane‎, 12-10-2016 07:50 AM
    • Replies: 0
    • Views: 1,807
    12-10-2016, 07:50 AM Go to last post
  51. Interpretation Interaction Term

    Hey, maybe you could help me with this interpretation (i'm learning with the slides). The model is about employment chances and the independen...

    Started by Hansbusch‎, 12-09-2016 06:23 PM
    • Replies: 0
    • Views: 1,316
    12-09-2016, 06:23 PM Go to last post
  52. Table interpretation (odds)

    Can someone help me interpret and understand this table? The question is: What effect does the age have on the odds for bodyweight=1 for persons who...

    Started by dymatize‎, 12-08-2016 08:14 AM
    • Replies: 2
    • Views: 1,809
    12-09-2016, 05:06 PM Go to last post
  53. conditional logit model_help with data interpretation

    0 down vote favorite I have performed a clogit following the instruction of Aizaki et al.2012 but I am not sure on how to interpret some results...

    Started by senzu‎, 12-08-2016 12:13 PM
    clogit, coefficient, logit model
    • Replies: 4
    • Views: 2,124
    12-09-2016, 09:26 AM Go to last post
  54. Logistic Regression - Predicted Probabilities with unknown variables

    Hi all, I'm wondering about how to calculate predicted probabilities using a binary logistic regression model when one or more of the variables in...

    Started by augustin‎, 12-06-2016 05:21 PM
    logistic regression
    • Replies: 2
    • Views: 2,030
    12-07-2016, 10:11 AM Go to last post
  55. Hello, I need some help please with two problems

    Hey guys, I have been struggling in this class and I am down to the last week, I have to pass this homework and extra credit problem to pass the...

    Started by run2rush2112‎, 12-02-2016 10:11 PM
    • Replies: 2
    • Views: 1,845
    12-04-2016, 08:13 PM Go to last post
  56. Regression for comparing two groups on one variable? And t-test with survey data?

    Hi - I have two populations / groups that I need to compare on one variable. Now usually I would use a t-test or anova but ive been told that...

    Started by TruroJP‎, 11-30-2016 05:01 PM
    analysis, anova, regression, t-test
    • Replies: 2
    • Views: 2,114
    12-02-2016, 04:41 PM Go to last post
  57. Multiple Logistic Regression question

    Greetings, I have three categorical IVs and one categorical DV. However, the DV is a self-reported ranking from 1 to 4 (1= not important, 4 = very...

    Started by Luxor‎, 11-30-2016 02:29 PM
    • Replies: 4
    • Views: 1,911
    12-01-2016, 01:46 PM Go to last post
  58. Which analysis represents better the "worse-ness" of my linear regression?

    Hello all, If I have two sets of data points, for instance: 1 10 2 14 3 17 4 12 5 19

    Started by mode1111‎, 11-28-2016 03:34 PM
    linear regression, statistical analysis
    • Replies: 2
    • Views: 1,953
    11-29-2016, 07:12 AM Go to last post
  59. P-value for a regression where expected slope is 1:1

    Hi, I am comparing two values for vegetation cover from two time periods. The expected value is y=x for the slope. I am curious how to calculate a...

    Started by drm258‎, 11-23-2016 07:09 PM
    • Replies: 6
    • Views: 2,116
    11-26-2016, 09:40 AM Go to last post
  60. Least squares estimate of alpha and beta

    My group have different opinions towards the following question: Find the least squares estimate of alpha and beta of the mechanistic growth...

    Started by acc_aac‎, 11-24-2016 05:02 AM
    nonlinear regression
    • Replies: 1
    • Views: 1,731
    11-24-2016, 10:23 AM Go to last post

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