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

Cpm/pert, how to make an attractive assignment

how to make an attractive assignment

Standara deviation - measure of dispersion , STANDARA DEVIATION Standa...

STANDARA DEVIATION Standard  deviation  is the  square  root of the  arithmetic  average of  squares of all  the deviations from the  mean. In short  it may  be defined  as th

Experimental method, In this method variables beings studied are contro...

In this method variables beings studied are controlled by the investigator. In other the effect of one variable is observed while other relevant variables are held constant

Describe the demand curve, The following equation gives Jane's linear deman...

The following equation gives Jane's linear demand curve for visits to a nearby national park.  Q is the number of visits per week and P represents the price of a pass (price per vi

Model, disadvantages of model in operational research

disadvantages of model in operational research

Game Theory, Task1:- A company is currently involved in negotiation with it...

Task1:- A company is currently involved in negotiation with its union on the upcoming wage contract. Positive signs in the table represent wage increase while negative sign represe

Concept and need for information, CONCEPT AND NEED FOR INFORMATION: W...

CONCEPT AND NEED FOR INFORMATION: We shall look at the meaning, of information as also the meaning of other related words such as data, facts, intelligence, advice, knowledge

Game theory , 3 In a rectangular game, pay-off matrix of player A is as f...

3 In a rectangular game, pay-off matrix of player A is as follows:

Duality, maximum 3x1+x2+x3-x4 subject to x1+5x2+3x3+4x4 x1+x2=-1 x3+x4

maximum 3x1+x2+x3-x4 subject to x1+5x2+3x3+4x4 x1+x2=-1 x3+x4

Operation Research, 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

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