Hypothesis

BA501 : The Class : Stats : Hypothesis
Hypothesis Testing
Assignments and Activities

§ Assignments and Activities §

Hypothesis Testing

§ Introduction §

Hypothesis testing is the second method of statistical inference. Confidence interval calculation was the first. When using confidence intervals, there is an attempt to quantify the value of the unknown population parameter (m in our case) over a range of possible values based on a point estimate (xbar). Hypothesis testing is designed to estimate the probability of the sample result (xbar) occurring by chance, if the hypothesized value of the population parameter (the null hypothesis, Ho) is in fact correct. If the statistical distance between xbar and m is large, we will reject the Ho. The alternative hypothesis, (Ha) which is the opposite of the Ho is then supported. If the statistical distance between xbar and m is small, we will support the Ho.

Objectives:

1. Study textbook and on-line material for a general understanding of hypothesis testing.

2. Use the 5-step method of hypothesis testing to test two-tailed and one-tail hypotheses concerning the population mean.

3. Use p-values and/or alpha values to test the hypotheses listed in #2 above.

4. Use confidence intervals to test two-tailed hypotheses.

Thought for Today

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class calendar for announcements and assignments.

To complete this Topic successfully, please complete the following activities in the order shown below:

Text TEXTBOOK READING: Read Chapter 8 in Kvanli, et. al.

Optional and free on-line texts for statistics: HyperStat and StatSoft

ON-LINE LESSON 1: Hypothesis Testing: Introduction

ON-LINE LESSON 2: Hypothesis Testing: Examples

SPREADSHEET: Excel and Equations

ASSIGNMENT: Home Work

Look here before beginning quiz if using a telephone modem.

SELF TEST: Practice Quiz

Visit this Web site, click on the features which apply to hypothesis testing and other topics of interest.

WEB ACTIVITY: WebStats

In this simulation, click the Alternative Hypothesis to see one and two tail test. The red arrow indicated the position of xbar. You can change any of the values in red boxes. Do not save changes.

Interactive Simulation

Use WebMail to send attachments and/or messages. Put BA501 (last name) Assignment name and number somewhere in the "subject" line of your e-mail. Address to BA501@mail.cba.nau.edu

WebMail

In addition to the material available at this web site, you may (optional) use WebTutor linked to WebCT. WebTutor is an interactive web site specfically covering the contents of the Kvanli (statistics) textbook assigned in this course. There is a fee for using this web site ($15). Have a credit card ready and click here to signup for this feature. When you have paid for WebTutor, you may click here to logon. You may download a free student guide to WebTutor by clicking here and then selelcting Student Support.

You should now:

Go on to Correlation Analysis
or
Go back to Statistics

Please reference "BA501 (your last name) Assignment name and number" in the subject line of either below.

E-mail Dr. James V. Pinto at BA501@mail.cba.nau.edu
or call (928) 523-7356. Use WebMail for attachments.