Neelabha Roy

11 Questions 10 Answers 0 Followers

Questions related from Neelabha Roy

What should be the minimum length of segments for Case Control study in Road safety?

Hello Everyone, I am working on Case Control study on an MDR (Major District Road). Can anyone tell me what should be the minimum length of the segment? Any suggestion or trick will be helpful. I...

15 May 2024 9,448 0 View

Which test should be done among t test and z test, when I have one group having 25 observation and the other group have 240 observation?

I have two groups. One has 25 observations, and the other has 240 observations. I want to test whether the two groups' means are different or not. Could you please tell me which test I should...

14 November 2023 1,419 4 View

What should be the appropriate buffer distance to examine the raodside land use effect on crashes in India?

Hello everyone, I have seen many papers examining landuse effect. But don't find the reason behind choosing the buffer length. If there is anyone who can give some tricks about appropriate buffer...

23 February 2023 8,365 2 View

How the traffic flow of intersections can be included in the road segment based analysis?

Hello everyone, I want to study on a road stretch of 55 km long. I want to do my analysis based on the segments of 1 km uniform length. Thus a total of 55 segments will be analyzed in the study....

24 September 2022 2,674 7 View

Can anyone give me the source of the all Police Station administrative boundaries within NCT Delhi?

Dear all, I need the administrative boundaries of all Police Stations situated within the NCT Delhi. If anyone has any idea about it, please share. Any kind of map or any other information by...

03 July 2022 7,473 0 View

How to deal with outliers of various dependent and independent variables in regression analysis?

Respected all, I am facing a problem while checking the outliers in my data. There are some outliers in each variable (both in the case of independent and dependent variables). And the outliers...

14 February 2022 9,938 5 View

What is the accepted Chi square value for crash prediction modelling?

Respected all, I am using regression modelling for crash prediction model. Can anyone tell me what should be the minimum value of Chi square for accepting in Publication? Thank you all in advance.

01 February 2022 9,737 4 View

Is there any correlation test needed before Principal Component Regression analysis?

Respected all, I am facing a problem while running regression analysis. In correlation test of 45 variables, there are around 30 variables are correlated. For that I am choosing PCA. In PC...

14 January 2022 295 13 View

Negative binomial or Poisson Modelling when there is a mixed of different type of independent variables?

Dear Sir/Madam, Can you help me in the selection of a count data model? I have one dependent and 10 independent variables. Among 10 independent variables, 6 variables have variance greater than...

06 December 2021 7,366 4 View

Scaling of variables is accepted or not for regression analysis?

Dear Sir/Madam, I have done regression analysis consisting one dependent and 7 continuous independent variables. I found vary small coefficient value (like .00000000000001 etc) while using the...

04 December 2021 2,433 4 View

Can anyone tell me the detail procedure of making Geographically Weighted Regression for crash data analysis?

Hello everyone. Hope you all are fine. I am using the GWR model for crash data analysis. But I need to know the basic steps to build the model and to check the applicability of the model. I have...

03 September 2021 594 3 View