R without matematics

More Aleksandar P. Medarevic's questions See All

Simar and Wilson or Fractional regression in the second stage of DEA?

The question is in the title. Could you give me resons for using one of them in my second stage DEA analysis?

31 December 2019 9,787 3 View

Fractional regression or Double-Bootstrapped Truncated Regression in the second stage of DEA?

Dear all, I used those two types of regression to estimate effects of environment factors on hospital efficiency. However, they gave me opposite results. For instance, in FR percentage of people...

10 November 2019 5,416 3 View

Atkinson index for grouped data?

I am struggling with measuring inequality in health-workforce between regions based on number of workers in each region and region population using Atkinson index (spreadsheet is in attachment)....

05 June 2019 2,436 5 View

GINI coefficient EXCEL/R/SPSS?

Dear colleagues, do you have some EXCEL template for calculate GINI coefficient and create Lorenzo curve? I find some R packages but I am not sure how to use it on my date with population and...

03 April 2019 7,147 1 View

Radnom sample froms survey data?

Using survey data, I planed to make log regression. Original sample size is 2000 and there are obaut 10% cases with outcome and 90% withoit it. May I chose amongst thant 90% random sample matced...

08 September 2017 460 1 View

Joinpoint Age

Joinpoint software can calcualte age-adjusted mortality rates from your data. Mora about that on https://surveillance.cancer.gov/joinpoint/age.html That is simple, but do you know how to analyze...

06 July 2017 1,404 0 View

Joinpoint- Model selection method

I am using Joinpoint for trend analysis of age-adjusted mortality rates. Can you help me what method to use: Permutation test or Bayesian Information Criterion? What are the reasons for the first,...

06 July 2017 9,295 0 View

''Average'' mortality rate?

This is a bit silly question. How to calculate "average'' age-adjusted mortality rate for 15-year period of time if I have age-adjusted mortality rate for every specific year? Second question is...

06 July 2017 1,466 7 View

Can someone explain me difference between one-step and two-step meta analysis with individual patient data?

What are we doing in one-step, and what in two-step?

04 May 2016 5,313 2 View

Homogeneity of variance is one of assumption for Repeated Measures ANOVA. How to test it? Is the Mauchly's is enough or should I use Box's test,too?

I think, in both tests, p-value must be >.05

03 April 2016 5,183 5 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

What kind of intervention will be relevant to increase motivation among young sport trainees?

Any suggestion on what book to read is also welcome.

03 March 2021 1,646 4 View

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

How to find the mean, SD and CI in SPSS?

Hi, I hope that someone can help me with this task: I have 5 groups of participants which are numbered in SPSS from 1 to 5 (according to their group number) and are all under the variable group....

03 March 2021 506 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View