# Hypothesis Testing Essay

1784 Words Apr 27th, 2013 8 Pages
Hypothesis Testing

Hypothesis testing is basically a process that uses statistical inference to test claims about population parameters. In hypothesis testing we begin by making a tentative assumption about a population parameter. This assumption is called the null hypothesis and is denoted by Ho. We then define another hypothesis, called the alternative hypothesis, which is the opposite of what is stated is the null hypothesis. The alternative hypothesis is denoted by Ha. The hypothesis testing procedure involves using data from a sample to test the competing claims indicated by the null and alternate hypotheses.

Testing the hypothesis is similar to a criminal trail. Ho: The defendant is innocent Ha: The
In order to evaluate the new design, several new carburetors will be manufactured, installed in automobiles, and subjected to research controlled driving tests. Notice that the product research group is looking for evidence to conclude that the new design increases the miles per gallon. In this case the research hypothesis is that the new carburetor will provide a mean miles per gallon exceeding 25; that is, [pic]. As a general guideline, a research hypothesis such as this is formulated as the alternative hypothesis. Thus appropriate null and alternative hypotheses for this study are as follows: Ho: [pic]< 25 Ha: [pic]> 25
If the sample results indicate that Ho cannot be rejected, we will not conclude that the carburetor improves mileage. Perhaps more research and testing needs to be conducted. If the sample data suggests that the null hypothesis can be rejected, the inference is made that [pic]> 25 since the researcher now has the necessary statistical support.
In research studies such as these, the null and alternate hypotheses should be formulated so that the rejection of the null, and hence the inference that the alternative is true, will provide the researcher with the conclusion and action being sought. The research hypothesis then should be expressed as the alternative hypothesis.

Testing Validity of Assumption

Testing Validity of

## Related Documents

• ###### Essay Hypothesis Testing For Anova Of Anova

Hypothesis testing in ANOVA Introduction: The case study deals with hypothesis testing in ANOVA. Where we have more than two samples. The samples are denoted by treatment also. We compare that whether the average effect of all the treatments is same or they differ significantly. Or we compare the independent mean and we conclude that whether the mean is same for all the populations or it differs significantly. Case Study: We have picked 3 balls foam, whiffle and rubber. We threw all the balls 11…

Words: 854 - Pages: 4
• ###### Hypothesis Testing Essay

Before being able to fully understand hypothesis testing and the five steps involved in the complete process, one must first understand what a hypothesis and a hypothesis test is and why it is used. To begin with, a hypothesis, when involved in statistics, is an idea which could be set in the form of an assumption or a theory that shows the characteristics of a single or even multiple variables of a single or group of populations (Aron, Aron & Coups, 2009). These ideas or predictions need to be explored…

Words: 726 - Pages: 3
• ###### Techniques of Hypothesis Testing Essay

Techniques of Hypothesis Testing Dr. Scott Stevens Objectives When you finish reading this article, you should be able to • Determine the appropriate null and alternate hypotheses for your hypothesis test • Determine if your test is one- or two- tailed • Conduct an appropriate test using Excel in any of three ways o Using the critical score approach o Using the non-rejection region approach (for a two-tailed test) o Using the P-value approach…

Words: 3013 - Pages: 13
• ###### One Sample Hypothesis Testing Essay

One Sample Hypothesis Testing The significance of earnings is a growing façade in today’s economy. Daily operation, individuals, and families alike rely heavily on each sale or paycheck to provide financial stability throughout. Depending on the nature of labor, wages are typically compensated in accords to one’s experience and education or specialization. Moreover, calculating the specified industry, occupation title, education, experience on-the-job, gender, race, age, and membership to a union…

Words: 1129 - Pages: 5
• ###### Testing the Random Walk Hypothesis Essay

Statistical Methods & Capital Markets Testing Random Walk Hypothesis Nicolas Mancini * Table of Content Abstract Theoretical background Methodology Data & Results Comparison Conclusion References ------------------------------------------------- I. Abstract The aim of this paper is to test the random walk hypothesis by applying the runs test on time series of several selected stocks. The random walk theory is the theory that stock prices changes have the same…

Words: 2272 - Pages: 10
• ###### Res 342 Week 4 Team Assignment Nonparametric Hypothesis Testing Paper

RES 342 Week 4 Team Assignment Nonparametric Hypothesis Testing Paper Get Tutorial by Clicking on the link below or Copy Paste Link in Your Browser https://hwguiders.com/downloads/res-342-week-4-team-assignment-nonparametric-hypothesis-testing-paper/ For More Courses and Exams use this form ( http://hwguiders.com/contact-us/ ) Feel Free to Search your Class through Our Product Categories or From Our Search Bar (http://hwguiders.com/ ) Use the same research question and data from…

Words: 2840 - Pages: 12
• ###### Testing The Conditional Hypothesis With Interaction Variable From Duverger 's Theory

This research report use a replication data from Clark And Golder (2006) article to test the conditional hypothesis with interaction variable from Duverger’s theory. The argument of his theory state that increasing the number of ethnic groups within a country will only to an increase in the effective number of electoral party if the electoral system is proportional or permissive. • Multivariate Regression Analysis Table~ ef{tab:example1} shows that when there are ethnic groups in a society there…

Words: 935 - Pages: 4
• ###### Essay The Importance Of Setting Goals At The Testing Program

Most of the companies today spent thousands of dollars for the testing program for the website but only few of them care to frame a hypothesis and set a goal before the begin testing. Due to this minor glitch companies, do not get good results even though their testing program is well built and well monitored. Importance of Setting GOALS It is always considered as a prime step to set a goal is because of the benchmarking strategy, which means that, instead of just bluntly analyzing the data and…

Words: 1606 - Pages: 7
• ###### Essay Test Results Based On The Theories

5.3 Testing the hypotheses The current thesis has investigated 9 core hypotheses with 16 sub-hypotheses. The following section will provide the hypotheses test results based on the AMOS software programme (AMOS statistics 23) and SPSS software (SPSS 23). It will start by testing the core hypotheses first, then followed by testing the sub-hypotheses in order as it is possible. To assess the hypotheses in the current thesis path analysis was developed to ensure the important and logical associations…

Words: 731 - Pages: 3
• ###### Essay about Psy 315 Complete Course Material All Weeks 1-5 a+Grade

Week 2 Team Assignment Descriptive and Inferential Statistics Paper Wk 3 DQ 1 DQ-1 What is the five-step process for hypothesis testing? Is the order important? Explain why or why not. Why do alphas differ among different fields of scientific investigation? How do ethics affect your chosen level of significance? DQ-2 Why is it said that hypothesis testing involves double negative logic? PSY 315 Week 3 Individual Assignment Chapter 2 Practice Problems 11 12 13 16 21 And Chapter…

Words: 7821 - Pages: 32