Two sample tests- hypothesis testing, Operation Research

Assignment Help:

Two Sample Tests

In some  situation the researchers may be taking  statistical decisions based on two samples. Each  of the  two  samples may  represent a particular under consideration. For  example one  may be interested to study the effectiveness of teaching methods like  unstructured teaching and  structured teaching. Suppose college have changed their method of teaching from  unstructured  teaching to structured teaching recently. Then the researcher has to take a random sample of students of a particular programme from  different colleges and collect their performances before introducing the structured methods of teaching  and after introducing the structured method of teaching. The respective observation will  form  two  samples .

There are many  more examples which  are as listed below:

a.Number of defects found in the daily  lots  of items produced by a set of similar machines  before  and after  installing a costly  automatic inspection systems in them.

b. Monthly  sales revenues of a product in different regions before launching  an advertisement  campaign and after launching the advertisement campaign.

c.Number of daily transaction in a bank  before and after introducing computers.

d. Number of outpatients treated in a government hospital before and after providing modern infrastructure.

There  are various non parametric tests  but we will  discuss only a few  of the  better  known and more widely used ones.

a.The sign test

1. One samples  test

2.Two sample sign test ( sing test for  paired data)

3.A rank  sum test ( Mann Whitney u test)

4. The one  sample  runs  test

5.Rank  correlation ( described in chapter 10 )

 

 


Related Discussions:- Two sample tests- hypothesis testing

Merits - correlation regression analysis , Merits a.It is simple  to ...

Merits a.It is simple  to understand  and easy  to calculate. b.It is very  useful  in the  case of data which  are of  qualitative nature  like  intelligence  honesty  be

Use of the graphs, Use  of the Graphs a . It simplifies  the complexi...

Use  of the Graphs a . It simplifies  the complexities of large numbers  or that of  large mass  of data. In general  graphical  or some  other method or representation  is ad

Identify and comment on cultural similarities, You are required to analyse ...

You are required to analyse the case study, as indicated under these headings: 1. Identify FIVE persons, bodies, organisations or groups in the case study. 2. For EACH of the

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

Linear programming, maximize z=3x1+2x2 subgect to the constraints x1+x2 x1-...

maximize z=3x1+2x2 subgect to the constraints x1+x2 x1-x2 x1,x2>_0

LPP, Solve the following Linear Programming Problem using Simple method. Ma...

Solve the following Linear Programming Problem using Simple method. Maximize Z= 3x1 + 2X2 Subject to the constraints: X1+ X2 = 4 X1 - X2 = 2 X1, X2 = 0

Solve the problem using simplex method, #question. A paper mill produces tw...

#question. 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 grad

Objectives of measuring dispersion - measure of dispersion, Objectives of M...

Objectives of Measuring Dispersion a. To judge the Reliability  of Measures of Central Tendency: Measure of dispersion  is the  only means  to test the  representative charac

Answering question to find shortest path, Answering Question to Finding Sho...

Answering Question to Finding Shortest Path - Operation Research Assignment Help Finding answers for shortest path problems are quite interesting and not easy to solve. In solv

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

Model building is the essence of the operations research approaches?

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