Umar Farouk Abbas

11 Questions 7 Answers 0 Followers

Questions related from Umar Farouk Abbas

How can I determine the extent to which demographic characteristic affect intention?

What tool can appropriately be used to analyze the data? Could it be regression analysis or correlation analysis?

10 October 2018 2,357 0 View

Please how do i compute a multiple regression with perfect fit?

i have been trying to run a multiple regression in SPSS package, where i have 10 variables of which one variable is DV and the remaining 9 are IVs. when linear regression was run it shows a...

07 July 2017 4,801 7 View

How can I induce an autocorrelation into the equation mathematically?

X_n= λY_n+(1-λ) X_(n-1)+2/3(Y_(n+1)-Y_(n-1)) Where λ is the smoothing constant, Y_(n-1) is the previous observations, Y_(n+1) is the future observations, Y_n is the present observation, such that...

08 August 2014 2,839 1 View

Can anyone help with signal resistance testing of a control statistic?

Does anybody have any idea on how to test for the signal resistance of a control statistic? The control statistic is in the attachment. Theory/lemma on how to achieve this is highly welcome.

05 May 2014 3,522 1 View

Variance derivation, can anyone help?

Given X_n=λY_n+(1-λ) X_(n-1)+(Y_n-Y_(n-1) ), considering the points Y_(n+1), Y_n, Y_(n-1) and then choosing two at random and taking the average? (Y_(n+1) - Y_n, Y_n-Y_(n-1), Y_(n+1)- Y_(n-1)...

04 April 2014 7,095 0 View

Combined control charts in a single chart

Please any idea on how to construct a combined control charts in a single chart (say EWMA control chart and xbar control chart)?in R or any statistical packages.

04 April 2014 1,763 3 View

How can I generate data with autocorrelation of a multivariate random variables in R?

I came across a code in Matlab on how to generate the data with autocorrelation "X=cumsum(rand(n,p)-r)", where n is the number of observations, p is the number of variables and r is the...

03 March 2014 5,524 4 View

Can anyone help with VAR(p) modelling with Autocorrelation?

Im trying to build a VAR(p) model with autocorrelation, even though among the assumptions of the VAR model is the error term 's autocorrelation should be zero. Is there a way to build such a model...

01 January 2014 5,962 2 View

Can someone advise on how to model the auto-correlative structure of the original data?

I am trying to determine the effect of autocorrelation on the performance of standard control chart, but first have to model the auto-correlative structure of the standard control chart for the...

01 January 2014 6,615 2 View

Multivariate EWMA ARL computation using R algorithm

How to do the computation of ARL for multivariate EWMA using the R program?

11 November 2012 1,686 0 View

What is the R program for Multivariate EWMA ?

R program on Multivariate EWMA

11 November 2012 482 0 View