standard error

  1. G

    General inverse variance method

    Hi I hope I've posted this in the right place. I'm converting standardised mean differences to log OR for a meta-analysis. Just wanting to know can I combine log OR with the standard OR I have from papers? Or would I need to convert the OR's from papers into log ORs for analysis...
  2. C

    Pleease help!? Filling in "blanks" in Regression Output

    Hello! Can someone please explain, I need to fill in the blanks marked They provide this info in a row: Coeff:-9074.674 Std.Err: ?? p-value: 0.000 95% Conf.Intervall: -13272.86, -4876,485 How do I calculate Std.Err & t-stat here? Please help me, thank you! :) Best Regards
  3. H

    SE of Reference category in Multinomial Logit Model

    I used R to fit a Multinomial Logit model to my data. The data includes some categorical variables as effect coded variables. For example, one variable has four levels of which one is the reference level. When I fit the model I get coefficients and corresponding Standard Errors for all three...
  4. F

    standard error

    Can I put a standard error on a standard error? Please explain.
  5. A

    Calculating forecast error for a long-term volatility forecast

    Hi, I am trying to calculate the forecast standard error for a long-term volatility forecast of a time series. I am simply using the unbiased estimator of the historical volatility of the time series as my forecast. The historical time series is monthly frequency with approximately 360 data...
  6. K

    Need help interpreting Standard Error and Standard Deviation

    Hello, In another post on SPSS forum I discussed Order effects where I split file on SPSS by order and conducted an independent t test looking at the effects of group on the DV. I found that the original result was only evident in order 1 and not order 2... however on the second order one...
  7. G

    Please help! How to calculate standard error to percent change and/or percent diff?

    Hi dear statistics gurus, I searched online and this forum to answer my questions, but am still not 100% sure what I'm doing is actually correct :-( For 2 separate experiments I'm trying to do 2 things: 1. calculate standard error for percent changes 2. calculate relative percent change...
  8. K

    Help calculating standard error of intercept

    Hi all, I'm running an equally weighted moving average multiple regression with 10 explanatory variables, and I'm looking at the change in alpha (intercept) and betas over time, including change in statistical significance. Since I need to run many regressions (1000+), i'm using Excel and the...
  9. R

    p value relationship to standard error as samples increase?

    Hi all, I would appreciate some help regarding the relationship between the p value and some other elements in my question below. Any help would be appreciated! I've spent about 4 hours researching this, and am still stumped.... How would you calculate the relative size of a p value given...
  10. DrAnthonyRodriguez

    Questions about the standard error

    SAMPLES The sample mean is an estimate of the population mean. And, the standard error (SE) of the sample mean -- s/SQRT(n) -- is a measure of the variability of the estimate. SAMPLING DISTRIBUTIONS The mean of a sampling distribution of a few sample means (i.e., “the mean of the few...
  11. G

    Standard error of estimates’ difference in Complex overlapping samples

    Hi All, I am dealing with survey data sourced by means of complex sample designs (involving stratification and clustering) across two survey waves. The two samples are to some extent overlapping, as some participants from the first wave have also responded to the second year’s wave. And I...
  12. J

    error propagation

    I have a point estimate of quantity 'A' and an associated standard error. If I calculate a new quantity (= ln-transformed 'A' multiplied by a constant), how is the standard error of the original quantity 'A' propagated? How do I calculate the standard error for this new, transformed value...
  13. S

    Standard Errors of Random Error

    Asking for help regarding Random errors Given that my model entails Ui which follows Normal (0, u^2), I ran SAS to estimate the random error (u^2) but, to make it lie within boundary of variance (>=0), I used logsig_u term which expressed as log(u). Now, I have the estimate and standard...
  14. J

    error propagation involving log-transformed values

    I have a question about error propagation and log-transformed data. I have a measured value of 'A' (=5.20) and an associated standard error (=0.29). I have a measured value of 'B' (=10.07) and an associated standard error (=0.65). I need to report the difference in log-transformed...
  15. J

    How to calculate standard error for win rates of sampled data

    Hi Forum, I'm working on a problem regarding win rates and can't find a good solution for calculation of standard error of my results. I have two groups playing games against each other. I want to calculate the win rate for Team A (then WR of Team B is 100%-WR of Team A). To do so, I...
  16. J

    R squared and Standard Error

    Hi, Can standard error be 94.10 when R squared is 0.67 in a linear model? Thanks.
  17. R

    Funnel Plot - not based on rate, %, expected v actual count.

    Hi, I have been tasked with producing some funnel plots that are somewhat different to the ones i am used to producing. Normally i would be plotting something along the lines of: X-axis: Number of discharges Y-axis: rate of re-admissions. However, this time i have been asked to produce...
  18. R

    Delta method

    I was wondering if anybody can help me as I've been stuck on this problem for ages and my attempts seem to all be incorrect so far. I have four estimators (W,Χ,Y,,Z) and standard errors for each. How can the standard error of D be cacluated from the following equation, where K, and L are...
  19. P

    Standard error of estimates

    I have the standard error of P (which is an estimator), and W is a constant, and now have the following equation E=W*sqrt(p) to obtain E as the target estimator . How can I calculate the standard error of E?
  20. A

    Two questions about my study

    I have 2 questions about my study: 1. I did a study but now I have only one male and the rest are females. I have like 19 sample size. So should I exclude the male subject or keep him and use an ANCOVA? 2. When i use an ANCOVA, I get the means and SE from SPSS, but no SD. Can I use that...