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Questions related from Jane Pads
I need to conduct a study in which the treatment group has two levels, say A and B. The sizes of these groups are really different, size of group A is 1 million while the size of B is 20,000. I...
05 May 2019 7,723 22 View
I know that the series is stationary and has long memory property if the fractional parameter d is between 0 and 0.5. But is it for stationarity or for testing that the series has a long memory?...
05 May 2016 8,123 5 View
i've been searching for the trial version of s-plus in internet but i found none. Anyone please tell me or provide me a link where I can download it?
04 April 2016 5,883 1 View
I've read articles, journals and books regarding long memory property of a time series data. And most of it found that, it is common in financial and economic perspective. I know , for example, in...
04 April 2016 4,808 7 View
Hi. I look at the journal of Hosking in proving the properties of ARFIMA (0,d,0). It says there, when d < 1/2, the power series expansion of (1-z)^(-d) converges for absolute value of z less...
11 November 2015 1,372 3 View
Hi, i just want to ask what is wrong with my codes that the forecast plot looks like in the attach file. The codes are these, > x ...
11 November 2015 9,861 0 View
Hi! i'm still confused of what problem in statistics should i consider to be included in my study. I want to find a topic for my thesis but i find it hard looking for it. can anyone suggests?
07 July 2015 6,286 5 View
I am trying to do a randomization test in Spearman's correlation in R. And i find it difficult to do the randomization part.
03 March 2015 175 3 View
I used the package "FinTS" in R to test if the residuals have an arch effect by using the function ArchTest(). Now the test is significant, so i want to see if arch(1) is ok. How is this done? Is...
03 March 2015 9,291 1 View
Can anyone give me a topic in statistics that might involve using randomization? just like the one sample test, anova, regression.. But this particular topics were already absorb in my class. So i...
03 March 2015 9,126 8 View
i am assign to make a written report regarding the real life applications of different sampling designs such as simple random sampling with and without replacement, systematic sampling, stratified...
10 October 2014 7,782 3 View
I conducted survey and the first variable in the questionnaire is about nightlife activities and it includes five questions. then the question is in likert item that is, the respondents will check...
10 October 2014 7,479 4 View
I have read that it can be used in forecasting. so what is the difference of this method and the usual method in forecasting? And also, I don't understand the concept that this method assigns...
10 October 2014 2,167 5 View
To be more specific in agriculture where this design is used?
10 October 2014 9,994 3 View
My independent variable is categorical with 3 categories and dependent variable which is continuous (GPA). Then I want to test if these two are related. Is the chi-square test for independence...
09 September 2014 7,101 10 View
A survey is to be made on the prevalence of the common diseases in a large population. For any disease that affects at least 1% of the individuals in the population it is desired to estimate the...
07 July 2014 6,329 5 View
When I run this code in R using the "arfima" package I get an error. data(tmpyr) fit
02 February 2014 2,280 3 View
I am seeking to compare the performance of arima and arma model in predicting the future values of my time series data. In doing so, I'm going to plot the forecast values of arma and arima...
01 January 2014 6,511 1 View
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11 November 2013 1,260 3 View
I just wanted to know the best software that can accommodate these things and is free.
11 November 2013 1,587 2 View
my candidate model is arima(5,1,5) the output in stata is the picture below. It seems like the other coefficient is not significant. I test the residuals and it is white noise, thus by box and...
10 October 2013 411 2 View
Is there any other application for arfima modeling (in time series) except financial data?
09 September 2013 8,814 1 View
