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Questions related to Advanced Statistical Analysis
I have an animal experiment with 4 different groups: A) control diet + vehicle B) control diet + drug C) experimental diet + vehicle D) experimental diet + drug. We then measure the expression of...
26 June 2018 3,914 3 View
I have tested one hypothesis in cross-sectional data and then in panel data. In cross-sectional sample it was positive and insignificant. In panel data it has come out positive and...
06 June 2018 1,928 6 View
what is the purpose of J-statistc and how to compute it? why do we use the difference between the J-statistic of restricted and unrestricted model as a diagnostic measure of endogeneity test....
06 June 2018 8,523 2 View
hello everyone, I have to calc the percentage error in a bland altman comparison of method. Are these data suficient? Bland-Altman comparison of V2L and V2FD Limits of agreement (Reference Range...
06 June 2018 8,480 0 View
In my regressional analysis(2stage least sqaures),I got negative R-squared along with Significant F-statistic. As I know, when R-squared value is very low, zero or negative, F-statistic will be...
06 June 2018 1,010 4 View
Hello I am trying to perform a dose response curve in R using drc package. I have 3 different biotypes of red rice sprayed with 5 different rate (dose) of a herbicide.I have 5 replications for...
06 June 2018 544 3 View
Hello, I wish to analyse normally distributed data by categorising it into 3 categories: low, moderate and high. What would be the best way to go about it? Will working out percentiles help? since...
06 June 2018 1,933 6 View
Hello there, I wrote a Matlab code for an optical system to trace a ray (via matrix method) through this system. The code also includes all the tolerances of the optical components such as...
06 June 2018 670 0 View
06 June 2018 766 4 View
Hello people, I want to know how to use GLM to compare mean number of granivore birds for "high water level" years and "low water level" years as shown in the picture provided below. This is an...
09 May 2018 4,989 6 View
Should I be doing a repeated measures analysis and therefore every rat has two pieces of data? One during the pre-test habituation and one during the test day? Or is the habituation data...
05 May 2018 8,582 1 View
I have looked on the internet and within R itself but I cannot seem to find the link or location to download the package.
05 May 2018 9,333 2 View
Hi, Im using four independent variables: income, interest rate, number of new households and increase in population to measure the effect of these factors on housing prices in two cities in...
05 May 2018 10,041 8 View
Hi, so I have a very weird situation with my thesis right now and I don't know how to test it. and I would highly appreciate if someone can help me. I have 14 independent variables. One sort of...
05 May 2018 3,433 3 View
I'm interested in assess effects gene-gene and gene-environment interactions on disease susceptibility using binary logistic regression models. All examples I've seen so far on this issue build...
05 May 2018 3,552 8 View
05 May 2018 599 5 View
The coefficient for endogenous is 0.313 with statistically significant. Thank you so much!
20 April 2018 917 4 View
Hello every one, We know that Pearson linear correlation coefficient gives the strength of linear relationship, while Spearman rank correlation coefficient gives the strength of monotonic...
06 April 2018 4,178 10 View
04 April 2018 5,824 4 View
I am conducting a research to explore the driving forces of crimes in a particular city. However, the city only has few zones (24). If I perform a regression analysis and have met all the...
04 April 2018 7,311 16 View
I am trying to statistically measure the effect of 2 binary factors (sex and a developmental factor) and their interaction on the correlations between 7 phenotypic traits. Tools (such as cocor...
04 April 2018 9,722 5 View
Let's say I have the total number of household of each zone in a particular city. I want to explore the driving forces of crimes (count data). As candidate's independent variables a have a set of...
04 April 2018 9,246 10 View
In my data-set, there are 8 explanatory variables. I took log transformation for 7 of those as doing so improves normality while one explanatory variable remains untrasformed as log transforming...
04 April 2018 3,741 15 View
04 April 2018 4,642 11 View