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

Distribution methods, 1: explain vogel''s approximation method? 2: explain ...

1: explain vogel''s approximation method? 2: explain optimality test?

LINEAR PROGRAMMING, SOLVE THE FOLLOWING LP USING SIMPLE METHOD MAXIMIZE Z=...

SOLVE THE FOLLOWING LP USING SIMPLE METHOD MAXIMIZE Z=3X1+2X2 SUBJECT TO CONSTRAINT X1+X2 X1-X2 X1,X2>=0

Problem formuation and model building, nature and types of problems

nature and types of problems

LPP, 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

Operational research model, characteristics of operational research model

characteristics of operational research model

Operation research methology, Ask question #Minimum 200 words accepted#

Ask question #Minimum 200 words accepted#

Sequencing problem, how do you use gantt chart for solving sequencing probl...

how do you use gantt chart for solving sequencing problem ? why is it not employed for solving larger problems?

Overview of writing research proposal, Overview of Writing Research Proposa...

Overview of Writing Research Proposal It may be written in words of the researcher or as answers following the guidelines provided by the sponsoring organization. A review of

Linear Programing, A paper mill produces two grades of paper viz., X and Y....

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

Types of correlation - correlation & regression analysis, Types of Correlat...

Types of Correlation 1. Positive Correlation : When the values of two variables move in the same direction .e. when an increase in the values of one variables is ass

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages