Z-test - hypothesis testing, Operation Research

Assignment Help:

Z-Test

Prof. Fisher has  given a method  of testing the significance of the correlation coefficient in small  samples. According  to this method the  coefficient of correlation is transformed into Z  and hence the  name  transformation. The statistic Z given by  prof. Fisher is used  to test:

a.Whether  an observed value  of r differs significantly from some  hypothetical value or.

b.Whether two samples values of  r differ significantly,

For  testing whether r differs significantly from zero the t- test is preferable.

In order to apply the test  we have to calculate Z and by applying Fisher transformation and then  calculate the  value  of the standard  normal  variate.

                 Z- ε / 1/√n-3


Related Discussions:- Z-test - hypothesis testing

Application Areas of Linear Programming, what is meant by Application Areas...

what is meant by Application Areas of Linear Programming?

Regression, Regression line drawn as Y=C+1075x, when x was 2, and y was 239...

Regression line drawn as Y=C+1075x, when x was 2, and y was 239, given that y intercept was 11. calculate the residual

Duality, Write a note on economic interpretation of dual?

Write a note on economic interpretation of dual?

Poisson Process, Telephone calls arrive at a switchboard in a Poisson proce...

Telephone calls arrive at a switchboard in a Poisson process at the rate of 2 per minute. A random one-tenth of the calls are long distance. (a) What is the probability of at least

Assignment, discuss about assignment and steps involved in it

discuss about assignment and steps involved in it

Linear pograming, application area of linear programing problem

application area of linear programing problem

Manufacturing operation , You are a manager at a medium sized manufacturing...

You are a manager at a medium sized manufacturing operation that sells a customized product directly to the consumers and the data pattern is linear but it can have the occasion ra

Model building is the essence of the operations research app, Model buildin...

Model building is the essence of the operations research approaches?

Stratified sample size - sampling size, Stratified Sample Size The  sa...

Stratified Sample Size The  sampling  study  has depended  much on the stratified sample  to reduce  the sampling  error, samples  size may have a number of strata or  cluster

Title page - report writing presentation, Title  Page Tthe title page...

Title  Page Tthe title page  should  indicate  the topic  on which  the report has been  prepared the  person  or agency who has  prepared it the  person  a agency for whom it

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd