Suppose X has a Poisson Distribution with parameter U. Given any integer r>= 1. Show that E[x(x-1)(x-2)...(x-r+1)]=U^r ?

09 September 2016 0 8K Report

And Also deduce the coefficient of skewness of X.

The coefficient of skewness of random variable Y with mean U and variance >0, is E((Y-U)^3)/sigma^3

Badges
Science topic

More Jagoo Girish's questions See All

Get last 5 values in a row with multiple columns?

Hello Folks, Suppose I have an excel of 3 rows, however it has 100 columns. I need to pull out the last 5 values in the rows. A1 = 100 B1 = 99 .... CV1 = 1 I need to be able to pull 1 2 3 4...

11 December 2018 6,056 1 View

Why do students (at Primary Level) hate Mathematics?

How can it be changed?

06 July 2016 330 5 View

How do I find the regression coefficients (multiple) for quadratic polynomial equation using a genetic algorithm?

Implementing in Scilab.

01 February 2016 9,348 0 View

Can someone help on this one? I keep getting errors in my codings. It is in scilab. The file is attached below.

function f=script(x) f= 60 + sum((x.^2)-10*cos(2*%pi.*x));endfunctionclearlines(0) objective='script' // the objective function filewmax=0.9; // initial inertiawmin=0.4; // final inertiaitmax=200;...

31 December 2015 1,009 2 View

Can someone guide me converting a matlab file to a SCILAB file.?

Matlab to Scilab codings.

10 November 2015 1,771 5 View

How can I prove d is a metric on X?

Well I managed to prove the symmetry. d(x,y) = sqrt ( (x1 - y1)^2 + (x2-y2)^2 ) for all x,y in R^2 x= (x1,y1) y=(x2,y2)

02 March 2014 8,352 3 View

Des Chiffres et des lettres.How can we write this program in Python?

Python

07 August 2013 6,687 7 View

Which test should be used to study association among demographic profile and awarness level?

i have to study the awareness and adoption level of cloud computing in a district of India. i also want to use association among demographic variables like gender, age, education, income etc and...

02 August 2024 2,420 3 View

Why 3 replicates for most biological assays? Is it enough to examine the data fits normal distribution?

Just bounced on me. Before statistically analysing significant difference, shouldn't we see if data fits normal distribution first? Is 3 replicates enough to testify the hypothesis of normal...

31 July 2024 8,141 13 View

Normality assumption for linear regression is The assumption of normality is whether for residual errors or predictor variavble?

When we conduct linear regression, there are several assumptions. The assumption of normality is whether the residual errors are normally distributed, not whether a predictor is normal?

31 July 2024 6,164 3 View

Posthoc test lettering in JAMOVI?

Does anyone know of a module for the JAMOVI software that is capable of generating mean separations using the classic letters based on post hoc results (e.g., Tukey test)? If, as I believe, such...

31 July 2024 3,333 4 View

How to test multivariate outlier in STATA?

Hey all, I need help testing for multivariate outliers using STATA for my master thesis. The literature recommends the Minimum Covariance Determinant (MCD) (Verardi & Dehon, 2010). I found the...

22 July 2024 8,821 2 View

How do I access .vcf files without an R statistical package?

I am currently working on a mendelian randomization study, and I have downloaded the datasets needed from the ieu opengwas project (mrcieu.ac.uk) in .vcf format. I do not have access to an R...

19 July 2024 2,342 5 View

How to decide whether the refinement is correct or not, based on Rwp and Rexp factors by Fullprof?

One of the papers I read by Toby, where (title of the paper was "R factors in Rietveld analysis: How good is good enough?"), he tells us that to get good chi square value, you must have low Rwp,...

17 July 2024 9,668 4 View

Chi-square test for allele distribution?

Hello, when calculating the p value for the alleles in the table, how do we place the values in the chi-square test in the four-eyed table? Thank you very much for your attention.

17 July 2024 998 2 View

How to analyse response rates of a questionnaire?

I have developed a questionnaire. I want to try and analyse question drop-off. There is a clear negative correlation between question number and percentage of respondents who answered that...

07 July 2024 9,435 1 View

Why does our stiff biochemical ODE model in R produce unreasonable results (negative values, NAM) despite using solvers like lsoda, vode, and rk4)?

We have developed an ODE model comprising 25 interrelated equations with common coefficients. This biochemical model, applied in wastewater treatment, is characterized by stiffness. Utilizing the...

06 July 2024 7,077 4 View