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

Frequency distribution graphs, Frequency  Distribution Graphs Freq...

Frequency  Distribution Graphs Frequency distribution graphs may be histogram frequency  polygon  frequency  curve  ogive curve.   1. Histogram The histogram is draw  f

LLp, A paper mill produces two grades of paper viz., X and Y. Because of ra...

A paper mill produces two grades of paper viz., X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade Y paper i

Reference books - report writing presentation , Reference Books If an ...

Reference Books If an article  in a reference  books has more  than one  author use the  same  format  for  authors  given for  books above. a. Authors Known :Authors last

Medical industry payments to physicians, Medical Industry Payments to Physi...

Medical Industry Payments to Physicians The relationships between physicians and medical related companies in the United States, generally acknowledged to be familiar given th

Method of calculation of mean deviation, Method of Calculation of Mean  De...

Method of Calculation of Mean  Deviation a. Computation of Mean Deviation Individual Series : The process of computing mean  deviation in case  of individual series involves

Lp model, A company produce three sizes of windows fans small,medium and la...

A company produce three sizes of windows fans small,medium and large. The manager has formulated an LP model for production.

#title scope.., scope of the operation research in modern management?

scope of the operation research in modern management?

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