Applied Statistics

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Questions related to Applied Statistics

Correlation of Returns does not match correlation of absolute values?

Hi, I want to calculate the correlation of the Bitcoin price with some other asset classes such as gold or oil. Therefore, I use the daily returns in percent of each asset and simply apply the...

12 November 2019 6,828 2 View

Why or why not using K-W and Mann-Whitney U tests?

I'm researching microplastic abundance and distribution in sandy beaches. I compared microplastic abundance between the intertidal and supralittoral zones and also between 4 beaches. My data is...

08 November 2019 8,640 3 View

Should I include those variables in Multi-variable linear regression?

I am currently building multi-variable linear regression model for water consumption prediction. Y is monthly household water consumption. I have demographics data for each household for my...

05 November 2019 5,409 7 View

Would you like to support this conference in Iraq?

Hi dear, Iraqi Association for Academic Quality and Collaboration (IAAQC) is planning for an international conference on applied statistics in Iraq. I would like to conduct a survey for those...

17 October 2019 7,098 7 View

What are your views on applying statistical analysis to thematically coded conversation analysis data?

I am trying to analyse discourse and will code my data. There will be two iterations of this in the form of a pre-task, intervention and post-task involving naturally occurring conversational...

02 September 2019 6,661 7 View

Kindly Need Statistical Advises on multistage stratified sampling?

I have recently collected data on a study area divided into three sites and each site was divided into four categories and each category was subdivided into 5 transects. Each transects were also...

02 August 2019 1,136 7 View

How to evaluate if the precision parameter, ɸ, in beta regression is "low" or "high"?

I am running a beta regression, my dependent variable is a proportion, beta-distributed such as y ~ B (µ,ɸ ), with µ its mean and ɸ, a constant precision parameter; the link function used, g(.),...

20 July 2019 1,338 1 View

Is there a special correlation coefficient for the calculation of a interval level variable and a ratio level variable?

I have two variables for which I want to calculate the correlation coefficient. One variable has an interval level (the values are 200, 400, 600, 800) the other has a ratio level. Is there a...

10 July 2019 8,905 3 View

Problem in regression model in which dependent variable emerged in both side of regression ?

Suppose i have regression model as- gdp = a+ bx+ c(z/gdp)+ e Here x is a vector of explanatory variables. z/gdp is one of my control variables. In this regression equation, GDP lies in both side...

11 April 2019 6,994 3 View

How to compare proteomics data from individual studies acquired in different mass spectrometers?

I am carrying out meta analysis, for which I am considering files available from public repository. The data has been acquired from different mass spectrometers. If have to use the data and show a...

08 January 2019 7,663 7 View

Two-way ANOVA results differ from one-way ANOVA results?

Hi there, I conducted three one-way ANOVAs for each of three categorical variables as grouping factors regarding a continuous outcome. All of these ANOVAs were significant. However, two of them...

17 April 2018 742 10 View

Is the choice of one of three post hoc tests depends on the accuracy of the results that the researcher wishes to obtain?

Dear scholars, As we know that: the Critical Difference of LSD < Critical Difference Tukey < Critical Difference Scheffe So, I'd like to ask whether the choice of one of the following...

12 October 2017 9,372 3 View

How can I determine whether two runtimes are significantly different?

I measured 20 times the runtime of three different C++ programs and I've got the following results (average): runtime_program_1 = 26,43 ms; runtime_program_2 = 27,02 ms; runtime_program_3 = 13,56...

15 June 2016 9,034 3 View

How do analyse dynamic path in survival?

I want to write a program of dynamic path analysis in R software for estimating direct, indirect, and total effects of treatment on time of death due to liver cirrhosis . data-set is as " csl" in...

14 June 2016 1,748 1 View

What model can i use to model a disjointed variable ?

i have an independent variable as length of breastfeeding in months, with an initial Exclusive period of brestfeeding and afterwards a non-exclusive period of breastfeeding. should i treat them as...

08 June 2016 2,111 3 View

Is there a way of infering causation when you have multiple endogenous regressors?

I am trying to estimate the impact of a development project on household dietary diversity in various consumption quintiles in Malawi. However, participation in the project is endogenous as it is...

08 June 2016 3,619 5 View

In establishment survey statistics, how important for calibration weighting is the regression weight in modifying the survey weights?

Calibration weights have been studied extensively as adjusted survey weights which take auxiliary data into account. A simple case of auxiliary data with linear regression through the origin is...

04 June 2016 879 3 View

Disaggregation using linear dependence of radar backscatter change on soil moisture change - do you have any software recommendations?

I'm going to apply disaggregation algorithm described in the linked article. I'm going to use Sentinel-1 data as the high resolution data source. I thought about implementing mentioned algorithm...

21 May 2016 2,651 2 View

Rep and Bio replicates in the same RNA-seq assay, how to deal?

Hello everyone, This is an RNAseq assay, for a apomictic plant and 12 clones of each genotype 30 millons reads for each libraryI have a very simple experimental design for screening...

17 May 2016 9,227 2 View

Distribution of variables and sensitivity analysis?

Hi, I am trying to find the relationship between physical activity and glucose levels using multivariate linear regression. Glucose levels is the dependent variable and physical activity measuere...

05 May 2016 6,738 6 View

How to calculate Inter-coder reliability across several categories?

How would you calculate inter-coder reliability (Kappa coefficient?) for the following scenario? 10 texts coded across 6 categories (codes) by 3 coders Mehdi

04 May 2016 1,280 2 View

I need examples where latent class analysis helped to identify heterogeneity within seemingly homogeneous concept. No specific research area. Can you?

I am looking for research articles where latent class analysis was applied and helped to identify heterogeneity within seemingly homogeneous concepts. Any area of research is welcome:...

02 May 2016 4,326 3 View

I have disparate data from the same set of samples. Can I tell R or R Commander that certain columns in an xcel file are means/SDs w/o using raw data?

I have data concerning fruit size, color, mass, soluble solids, and some other phtyochemical properties. Samples are sorted by Year of Harvest, Date of Harvest, Species, and Location. The...

29 April 2016 3,720 5 View

What acceptance criteria should be used for estimating the measurement uncertainty from profficiency testing data?

Through Nordtest approach it is possible to estimate the measurement uncertainty from profficiency testing data, but what acceptance criteria should be used for molecular biology quantitative testing?

28 April 2016 6,237 2 View

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