How to compare means of multiple groups (say 40 groups) which have different sample sizes and standard deviations?

I have around 40 groups. They have different sample sizes. For example in first group 10 people responded, in second group 25 people responded, in third group 5 people responded and so on. The...

11 December 2017 1,946 4 View

How to conduct Non-Parametric Mean Difference Test?

I have a survey data. The format is as follows: Region 1: Res Credit Investments A 1 0 B 5 5 C...

10 November 2017 1,110 3 View

When to apply Modified Mann-Kendall Test?

I have data on crop yield for 600 districts of India. I wish to conduct trend analysis of this yield for each district for say last 20 years. To conduct trend analysis, Man-Kendall test is well...

09 October 2017 2,408 19 View

Are Normality and Non Linearity Tests in Principal Component Analysis Important for Interval Scale Data?

I have an interval scale survey data. I have defined the socioeconomic status of the survey site with 5 parameters and wish to create a composite index. I do not have any prior weights for these...

06 July 2017 9,797 4 View

Issue with Statistical Model Building

I want to asses impact of fertilizer, seeds and irrigation on crop productivity. Total observation number is 100 and its a panel model. The issue is that while dependent variable requires log...

06 July 2017 7,820 4 View

From where can I get horticulture statistics (fruits and vegetables) for India district wise from 1997 onwards?

I am looking for district wise horticulture statistics, that is, area and production, for India, district wise, from 1997 onwards. However, I am not able to find any compiled dataset. Mainly its a...

04 May 2017 6,479 10 View

How to account for relation between independent and dependent variables in a small response set for 40 technologies?

Hello Experts! I have a set of 40 technologies and their corresponding adoption level. Also I have information various adoption barriers like market connectivity, finance and machinery. It is a...

02 March 2017 7,988 2 View

How to compute index with ordinal data?

02 March 2017 6,034 5 View

Simple Stats Question: Standardize such that data has a standard deviation of 10. How ?

02 March 2017 8,809 0 View

Generalized formula for Mazziotta Pareto Index ?

I recently came across this paper "http://host.uniroma3.it/progetti/capabitaly/db/docs/Mazziotta-Pareto_14_aprile_2014.pdf " , which is based on Mazziotta Pareto Index. My query is regarding the...

02 March 2017 8,557 10 View

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View

PACYC PCR not working after several attempts. Would anyone have any suggestions?

So, I have been trying to run a pACYC PCR which will be used later on for a Gibson Assembly. However the PCR is not working. I have already tried gradient PCR and changing extension time; however...

02 March 2021 1,146 2 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

No title

01 March 2021 3,905 5 View

What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

Where can I find atmospheric measurement profiles (temperature, density, etc.) between 300-800 km altitude?

I am investigating thermospheric mass density profiles between 300-800 km altitude. I would like to compare the variability with other parameters, including temperature, electron content,...

01 March 2021 5,902 3 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View

How to calculate Z (the number of molecules in a unit cell) for calculating theoretical density?

I am trying to calculate the theoretical density of my ceramics materials. I use the formula below to calculate the theoretical density: Theoretical density = (Molecular weight x No. of molecules...

24 February 2021 3,823 2 View