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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. question !!

    I am helping my niece in explaining regression analysis by studying by myself and finding problems and trying to solve those. one of the problem has...

    Started by rka_stat‎, Yesterday 06:33 AM
    • Replies: 4
    • Views: 143
    Today, 07:58 AM Go to last post
  2. Correlating two pitch contour models

    I am determining tonal ability (the ability to express tones in a tone language, a language which requires a change in pitch to differentiate meaning...

    Started by jkao1‎, 04-28-2017 03:21 PM
    • Replies: 0
    • Views: 75
    04-28-2017, 03:21 PM Go to last post
  3. Nested logit?

    I am researching about different modes of transportation and i need to get the utility function of each mode. My dependent variable is the modes of...

    Started by Paul_research‎, 04-26-2017 11:04 PM
    • Replies: 0
    • Views: 128
    04-26-2017, 11:04 PM Go to last post
  4. AIC computation

    (1) Compute the Akaike Information Criterion (AIC) value for the linear regression model Y = b0 + b1*X1 + b2*X2 + b3*X3. The regression model was...

    Started by shane414‎, 04-26-2017 06:25 AM
    regresiion, regression analysis
    • Replies: 0
    • Views: 128
    04-26-2017, 06:25 AM Go to last post
  5. How to do a linear multiple regression with multiple correlating independent vars?

    Right I am a total newb at stats but I'll try an explain what I'm trying to do. Im trying to find whether China's Foreign Direct Investment...

    Started by zakqux93‎, 04-26-2017 06:10 AM
    • Replies: 0
    • Views: 84
    04-26-2017, 06:10 AM Go to last post
  6. Normality

    I did a test of normality in STATA on my dependent variable. The rest was significant thus violations of normality. After taking the log, there is...

    Started by Jazz3‎, 04-21-2017 11:37 AM
    2 Pages
    1 2
    • Replies: 18
    • Views: 368
    04-26-2017, 05:39 AM Go to last post
  7. Understanding Mixed Effects Regression Models

    Can anyone explain to me the difference between mean effect and change when using a mixed effects regression model? I understand mean effect to be...

    Started by Brook99‎, 04-26-2017 03:34 AM
    • Replies: 0
    • Views: 68
    04-26-2017, 03:34 AM Go to last post
  8. Data scattered around y=x

    Hello everyone, I am a researcher in engineering. I do have some background on statistics and mathematics in general, but I am not a professional...

    Started by math4engz‎, 04-23-2017 08:28 AM
    r squared, regression, statistics
    • Replies: 14
    • Views: 348
    04-25-2017, 08:15 PM Go to last post
  9. Exclamation Research Proposal - Statistical Analysis?

    I am submitting a research proposal, "Does the relationship of exercise and quality of sleep differ with age?" where age is the moderator. It has...

    Started by mackk2‎, 04-25-2017 08:00 AM
    • Replies: 6
    • Views: 143
    04-25-2017, 11:41 AM Go to last post
  10. Regression MC

    Can someone confirm the answers to the below? And advise which ones are incorrect. Thanks! 1) True/False: Models selected by automated variable...

    Started by shane414‎, 04-23-2017 08:18 PM
    • Replies: 7
    • Views: 267
    04-25-2017, 09:27 AM Go to last post
  11. Geographically Weighted Ordinal Logistik Regression

    Hello, I'm studying about Geographically Weighted Ordinal Logistik Regression. but I have trouble getting a book or reference that is related to it....

    Started by Pamona D‎, 04-24-2017 09:12 PM
    ordinal logistic reg, regression analysis
    • Replies: 0
    • Views: 88
    04-24-2017, 09:12 PM Go to last post
  12. Question Independence of cases (observations)

    Dear all, I am currently analyzing the effects several independent variables have on dependant variable (political party's position on...

    Started by tomas.bek‎, 04-24-2017 12:36 PM
    durbin watson, independence, observations, ols, regression
    • Replies: 0
    • Views: 84
    04-24-2017, 12:36 PM Go to last post
  13. how to interpret regressions with spatial autocorrelation?

    Hi guys, I am currently doing a GIS and statistical project on whether there is an association between access to green space and deprivation at...

    Started by mariabenedict97‎, 04-23-2017 08:11 AM
    • Replies: 1
    • Views: 83
    04-23-2017, 10:16 AM Go to last post
  14. Regression Analysis Practice

    I'm trying to solve these questions from a self-study for actuarial sci. I would appreciate if someone can verify and help explain the following. I...

    Started by shane414‎, 04-23-2017 03:22 AM
    • Replies: 2
    • Views: 180
    04-23-2017, 09:15 AM Go to last post
  15. Test for multivariate analysis using multiple types of independent variables?

    Hey all, I'm new to the forum and relatively new to statistics (I took an intro biostats class, that's it). I'm working on my first "real world"...

    Started by immaxf‎, 04-22-2017 06:21 PM
    • Replies: 1
    • Views: 130
    04-22-2017, 08:44 PM Go to last post
  16. Logistic regression : negative coefficients, categorical variables

    Hi I am trying to build attrition model and have these variables :- 10 categorical variables with sub levels which created into dummy variables and...

    Started by Boo‎, 04-22-2017 06:05 AM
    coefficient, logistic regression
    • Replies: 3
    • Views: 158
    04-22-2017, 09:55 AM Go to last post
  17. Zero inflated negative binomial regression interpreting main and interaction effects

    I am running a zero inflated negative binomial model (zinb) and want to interpret the main and interaction effects. I have the following: ...

    Started by random_android‎, 04-21-2017 03:51 PM
    interaction effects, main effect, negative binomial model, stata 14, zero inflated
    • Replies: 4
    • Views: 167
    04-22-2017, 02:43 AM Go to last post
  18. confidence interval

    how do you find confidence interval ?

    Started by rka_stat‎, 04-19-2017 03:55 PM
    • Replies: 3
    • Views: 181
    04-20-2017, 07:49 PM Go to last post
  19. How to report and interpret non significant single regression? Its urgent plz help

    HI, can anyone please help me interpret this picture? we have not learnt this yet. will be grateful! ...

    Started by Amna_22‎, 04-20-2017 08:35 AM
    • Replies: 1
    • Views: 155
    04-20-2017, 10:10 AM Go to last post
  20. margin of error

    how do you find 95% margin of error ?

    Started by rka_stat‎, 04-19-2017 03:56 PM
    • Replies: 1
    • Views: 142
    04-20-2017, 08:20 AM Go to last post
  21. best point estimate and approximate interval estimate

    First Question: I need to calculate best point estimate for population of 4500. My understanding is it is (intercept + (variable*4500). Is that...

    Started by rka_stat‎, 04-19-2017 03:19 PM
    • Replies: 0
    • Views: 85
    04-19-2017, 03:19 PM Go to last post
  22. Question Analysis of multiple dependent variables of different sample sizes

    Thanks in advance for your help, I'm not a statistician, so I'm struggling to understand the best way to analyse some biological data, and I...

    Started by StatLess‎, 04-19-2017 09:32 AM
    • Replies: 0
    • Views: 82
    04-19-2017, 09:32 AM Go to last post
  23. Binary LR-Forward Stepwise: Should I report the each step entered in the result?

    Dear all, I used binary logistic regression in a forward stepwise method to classify my two groups of participants (depressed vs. healthy) using...

    Started by Ping Koo‎, 04-19-2017 07:51 AM
    • Replies: 0
    • Views: 80
    04-19-2017, 07:51 AM Go to last post
  24. Log regressions

    So between these two log regressions: 1) transform y into log but keep X normal 2) transform both the y and x into log When or what would be a...

    Started by Jazz3‎, 03-31-2017 04:05 AM
    • Replies: 9
    • Views: 370
    04-19-2017, 02:15 AM Go to last post
  25. Fixed effects model urgent help

    So I have a dataset which I am trying to use the fixed effects model on. I am confused if I am doing it correctly. I am using panel data to...

    Started by jdev10‎, 04-18-2017 11:02 PM
    • Replies: 0
    • Views: 116
    04-18-2017, 11:02 PM Go to last post
  26. From time 1 to time 2

    Hello, I am having a hard time to understand an issue which has been pointed out to me, though with limited further explanation. I am testing an...

    Started by Ted Brasil‎, 04-18-2017 04:35 PM
    • Replies: 0
    • Views: 115
    04-18-2017, 04:35 PM Go to last post
  27. High concentration at one level of multiple regression

    I am running a regression where the dependent variable is income gain. In about sixty percent of the cases the intervention fails and there is no...

    Started by noetsi‎, 04-18-2017 09:53 AM
    • Replies: 0
    • Views: 115
    04-18-2017, 09:53 AM Go to last post
  28. Derivation of an equation of Influential Analysis in OLS

    Hi to everyone, I'm new to this forum and I'm very pleased for the existence of this forum, since the fact that forums in these times are in decay....

    Started by alexjmackh_94‎, 04-16-2017 07:05 PM
    econometrics, influential outliers, ols
    • Replies: 2
    • Views: 135
    04-17-2017, 10:32 PM Go to last post
  29. Newbie Question

    Hello, Just wondering if someone could help me. I have a degree in Maths and have done second year Uni Maths stats (but quite a while ago) so...

    Started by PinkyP2‎, 04-13-2017 11:44 PM
    • Replies: 4
    • Views: 264
    04-16-2017, 11:31 PM Go to last post
  30. interpreting p-value in a table

    Hello. I am reading an article of how herbal tea affects INR values (the hypthesis is - that those who drink herbal tea have INR values outside the...

    Started by laradf‎, 04-15-2017 04:56 PM
    • Replies: 1
    • Views: 164
    04-15-2017, 10:27 PM Go to last post
  31. A question regarding simultaneous relationship and its implications on predictions

    Hey guys, I have a question regarding The simultaneous relationships and the Implications it has on regarding whether the said variable will be...

    Started by orenz10‎, 04-14-2017 08:22 AM
    • Replies: 0
    • Views: 119
    04-14-2017, 08:22 AM Go to last post
  32. Question Mediated regression (parallel): Opposing effects → how to interpret total effect?

    Hi everyone! In my student assistant job I had to to test a model of mediated regression, with various variables mediating the effect of A on B....

    Started by Jona‎, 04-13-2017 07:46 AM
    mediated regression, mediation, process tool, spss
    • Replies: 0
    • Views: 186
    04-13-2017, 07:46 AM Go to last post
  33. Can you include X1/X2 in a model when you've already included X1 and X2?

    Can you include X1/X2 in a model when you've already included X1 and X2? For example, I am trying to predict housing prices. X1=square feet and...

    Started by smw10c‎, 04-08-2017 12:40 PM
    • Replies: 4
    • Views: 264
    04-11-2017, 02:59 PM Go to last post
  34. Is it best to match data units to get a logical regressional relationship?

    Hi, I'm trying to find an economic relationship between inflation(CPI) and leakages to the economy like Taxes, Savings, and Imports. Well, it...

    Started by Zenny‎, 04-10-2017 09:22 PM
    inflation
    • Replies: 6
    • Views: 249
    04-11-2017, 02:20 PM Go to last post
  35. Variable change from significant to not significant

    I run a multiple regression with 4 main drivers and some control variables. Then I had to run another regression but with six main drivers (of...

    Started by Jazz3‎, 04-09-2017 09:08 AM
    • Replies: 7
    • Views: 341
    04-11-2017, 07:17 AM Go to last post
  36. Interpret regression dummies

    Hi there :yup: So I am having troubles understanding something. I had to run a regression, taking category A as base (highest share) The...

    Started by Jazz3‎, 04-09-2017 08:49 AM
    • Replies: 3
    • Views: 199
    04-10-2017, 10:00 AM Go to last post
  37. Regression Analysis

    I was working through the following set and needed some clarity on them. I attempted these questions (with my answers below) but need help to see...

    Started by msoe414‎, 04-08-2017 03:22 AM
    regression analysis, statistics
    • Replies: 1
    • Views: 243
    04-10-2017, 09:58 AM Go to last post
  38. Quadratic formula doesn't add up (SPSS)

    Hello, SPSS will draw a quadratic fit line on a scatterplot if requested and provide the formula (see attached). I have typed out the quadratic...

    Started by HanEyeAm‎, 04-07-2017 09:28 PM
    • Replies: 9
    • Views: 367
    04-09-2017, 07:46 PM Go to last post
  39. Panel data regression estimatetion method

    Hi, I am facing some problems with a panel dataset, and I hope somebody could help me. I have a pretty large data set (approx. 5000 firms, 15...

    Started by RickL‎, 04-09-2017 05:53 AM
    fixed effects, panel data, panel regression, pooled ols, random effets
    • Replies: 0
    • Views: 155
    04-09-2017, 05:53 AM Go to last post
  40. Model validation in regression

    I was wondering, for this question and why. I think its in-sample but curious why. 1) Models need to be validated: a. In-sample b....

    Started by msoe414‎, 04-07-2017 03:49 PM
    • Replies: 4
    • Views: 276
    04-08-2017, 06:58 PM Go to last post
  41. backtranformation of log transformed data

    Hi forum, I've a simple question that has probably a difficult answer. In a lineair regression of the form: log(y) ~ x resulting in an...

    Started by koen‎, 07-25-2006 09:39 AM
    • Replies: 2
    • Views: 2,353
    04-08-2017, 02:58 PM Go to last post
  42. Regression with Continuous and Dummy Independent Variables

    Dear Colleagues, I am running a multivariate linear regression analysis but got stuck with this situation. I have one dependent variable (which...

    Started by tomas.bek‎, 04-03-2017 08:56 AM
    continuous variables, dummy variables, multivariate regression, ols, regression
    • Replies: 13
    • Views: 608
    04-05-2017, 04:07 PM Go to last post
  43. Variance of a sum of predictions

    Hi, I predict the spatial distribution of a species on a regular grid using a regression model. Species numbers vary with environmental...

    Started by mmercker‎, 03-31-2017 08:03 AM
    population size, prediction interval, spatial analysis
    • Replies: 8
    • Views: 551
    04-03-2017, 01:44 AM Go to last post
  44. Outlier Statistics Using EVIEWS 9

    Viewing outliers in least squares regressions in EViews 9 and Viewing series, Missing Data, Outliers in Eviews 9. An Eviews program is provided that...

    Started by willylexander‎, 04-02-2017 06:14 AM
    outlier eviews 9
    • Replies: 0
    • Views: 159
    04-02-2017, 06:14 AM Go to last post
  45. Hypothesis interpretation

    Dear I'm wondering how I should interpret my hypotheses. The first one is "the relationship between X1 and Y increases as X3 increases" and the...

    Started by Hypnoz‎, 03-31-2017 02:03 PM
    • Replies: 4
    • Views: 274
    04-01-2017, 03:09 AM Go to last post
  46. Elasticity from linear and log-log regression model

    I am having problem understanding the calculation of elasticity. if I am using the log-log model eg: log(Y)=constant+β1 log(X1)+β2 log(X2) . So i...

    Started by korzuen‎, 03-31-2017 01:11 PM
    elasticity, log, regression
    • Replies: 3
    • Views: 272
    04-01-2017, 01:22 AM Go to last post
  47. Unique vs. Shared Variance Multiple Regression

    Hi all, I am having trouble with interpreting the explained variance of my multiple regression model. I ran a hierarchical model with nine...

    Started by Aegislash‎, 03-31-2017 04:43 AM
    • Replies: 1
    • Views: 252
    03-31-2017, 06:41 PM Go to last post
  48. How to handle a skewed dependent variable?

    Hello, i had another thread, where the scatterplot of the dependent variable and independent variable looked like the pic ('scatterplot2'). Now...

    Started by Franziska13‎, 03-30-2017 06:13 AM
    • Replies: 3
    • Views: 279
    03-31-2017, 07:42 AM Go to last post
  49. different linear regression formulas from same population

    hello to all, my question needs some explanation first; i want to test the efficiency of formulas for weight prediction but since medical...

    Started by srht ky‎, 03-29-2017 06:32 AM
    • Replies: 2
    • Views: 298
    03-30-2017, 01:46 PM Go to last post
  50. Multiple linear regression, I seek kind help for a result interpretation :)

    So, I've been struggling with a statistics problem for some time now and was wondering if you could shed some light? The regression's Dependent...

    Started by you_are_awsome‎, 03-30-2017 10:27 AM
    • Replies: 2
    • Views: 192
    03-30-2017, 10:36 AM Go to last post
  51. Reverse Engineering a calculator

    Hi A colleague in a different department posed an interesting question that I've been giving more thought to lately. Basically, a scientist here...

    Started by jamesmartinn‎, 03-30-2017 07:59 AM
    • Replies: 1
    • Views: 150
    03-30-2017, 09:41 AM Go to last post
  52. External validation of a log reg model using Nagelkerkes R2 w/ fixed parameters

    I have a dataset containing a point score (an integer between 0-41) and mortality (0/1) for a sample. I have performed a logistic regression...

    Started by ag90‎, 03-30-2017 08:05 AM
    external validation, logistic regression, nagelkerke, rsquared
    • Replies: 0
    • Views: 101
    03-30-2017, 08:05 AM Go to last post
  53. Negative Binomial Regression - Is this scatterplot okay (pic)?

    Hi there, One assumption of negative-binomial regression is linearity. I have this scatterplot of IV and DV? Would you say that there is...

    Started by Franziska13‎, 03-27-2017 08:18 AM
    • Replies: 3
    • Views: 297
    03-28-2017, 09:37 AM Go to last post
  54. % dependent and independent variables

    Hi all is a linear regression model appropriate when both the dependent and independent variables are % values of the total population in any given...

    Started by ldarley‎, 03-27-2017 01:48 PM
    • Replies: 0
    • Views: 247
    03-27-2017, 01:48 PM Go to last post
  55. Statistical proofs for experts

    Hello community. Is anyone expert enough to find the solutions to these two problems?

    Started by l2vanir‎, 03-25-2017 03:50 PM
    • Replies: 2
    • Views: 368
    03-26-2017, 11:41 AM Go to last post
  56. Heteroskedasticity

    I found heteroskedasticity in my data and I took the log for my dependent variable in SPSS. My independent variables are dummies). To be sure I...

    Started by Jazz3‎, 03-24-2017 12:30 PM
    • Replies: 7
    • Views: 426
    03-26-2017, 06:47 AM Go to last post
  57. SPSS is kicking out my variables [regression]

    So I am doing a multiple regression, with some independent variables. For control variables, I created dummies for the years. I have five years...

    Started by Jazz3‎, 03-21-2017 11:38 AM
    • Replies: 8
    • Views: 460
    03-24-2017, 10:59 AM Go to last post
  58. Unhappy I need help with my regression analysis for research capstone.

    Hi all, I'm new to regressions and also new to posting here. My topic is: How have E-books Affected College Textbook Prices? My hypothesis...

    Started by tlowe‎, 03-22-2017 02:59 PM
    • Replies: 9
    • Views: 458
    03-23-2017, 08:45 AM Go to last post
  59. What do you do it you can't increase X by one level while holding all other X constan

    Classical regression defines the slope as the change in Y for a one unit change in X holding all other X constant (or so I believe). :p What happens...

    Started by noetsi‎, 03-22-2017 12:36 PM
    • Replies: 7
    • Views: 345
    03-22-2017, 06:19 PM Go to last post
  60. Multiple regression analysis: linear or logistic?

    Hello! I have a question regarding multiple regression analysis: for numerical variable I should use linear regression and for dichotomous...

    Started by lacri‎, 03-21-2017 01:51 PM
    • Replies: 1
    • Views: 291
    03-21-2017, 04:18 PM Go to last post

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