What is the cut off value of correlation coefficient among independent variables, to be considered as collinear/high correlated variables?

Please, if someone could give me some reference papers/books I would appreciate it. Thank you in advance! PS

31 December 2018 9,110 3 View

How the predicted R-Squared is mathematically calculated?

I would like to know how the predicted R-Squared are calculate because I want to use it to determine whether I am overfitting a my regression model by including to many terms, based in Mr. Jim's...

10 November 2018 6,513 6 View

What should I do with this two outliers, which I know their causes?

Hi all, I have aggregated count data of criminal incidents in each neighbourhood of a particular city. I also have the population of each of those particulars neighbourhoods. I want to create a...

08 September 2018 9,278 8 View

How permutation works to calculate pseudo p-value in Moran Index (Spatial Autocorrelation)?

I want to see a real example, just to clarify my thoughts! Thank you in advance!

05 June 2018 7,765 2 View

Which function should I use to highlight low and high values in my data (variable)?

Let's I have the a have a variable "A" which range from 80 (Min) to 50000 (Max) and the mean is 2500. I want to highlight both, low values and high values. Which function should I use to weight my...

04 May 2018 619 7 View

There is any tool that can convert roads in polygon format to line (centreline)?

I have a road shapefile in polygon format and I want to take the centreline and end up with a shapefile in line format because I need the road's intersections. Thank you in advance!

04 May 2018 954 11 View

What is the minimum number of observations that I must have to perform a regression analysis?

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...

03 April 2018 7,158 16 View

In regression analysis, should I use independent variable as a percentage or their natural units?

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...

03 April 2018 9,151 10 View

Should I normalize my independent variables in OLS regression or just use their absolute value?

I have some independent values, e.g. percentage of head of the household with low low education per zone, percentage of unemployed people per zone [...] The percentage is related to the total of...

02 March 2018 1,813 11 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 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

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

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View