E-Marketing 2nd Ed. (2001)
by Strauss and Frost. Prentice Hall. ISBN: 0-130-32264-4
(formerly called Marketing on the Internet in its 1st edition)
Publisher's Page, Amazon.com Page

Principles of Internet Marketing (2000)
by Ward Hanson. South-Western Pub. ISBN 0-538-87573-9
Publisher's Page, Amazon.com Page

Strategic Electronic Marketing (2001)
by Brad Kleindl. South-Western Pub. ISBN: 0-324-01319-1
Publisher's Page, Amazon.com Page

Internet Marketing, 3rd Ed. (2000)
by Charles Hofacker. John Wiley & Sons. ISBN: 0-471-39051-8
Publisher's Page, Amazon.com Page

Advertising on the Internet, 2nd Ed. (1999)
by Zeff and Aronson. John Wily & Sons. ISBN: 0-471-34404-4
Publisher's Page, Amazon.com Page

Customers.com (1998)
by Patricia Seybold. Times Books. ISBN: 0-812-93037-1
Publisher's Page, Amazon.com Page

Marketing and the Internet (2001)
by Eloise Coupey. Prentice Hall. ISBN: 0-130-16975-7
Publisher's Page, Amazon.com Page

E-Commerce (2001)
by Rayport and Jaworski. McGraw-Hill HE. ISBN: 0-072-46521-2
Publisher's Page, Amazon.com Page

The Internet Marketing Plan, 2nd Ed. (2000)
by Kim Bayne. John Wiley & Sons. ISBN: 0-471-35598-4
Publisher's Page, Amazon.com Page

Internet Marketing (2000)
by Paul Richardson. McGraw-Hill HE. ISBN: 0-072-42793-0
Publisher's Page, Amazon.com Page

Electronic Marketing (2000)
by Reedy, et all. Harcourt College Pub. Pub. ISBN: 0-030-21107-7
Publisher's Page, Amazon.com Page

Strategic Marketing for a Digital Age (1998)
by Bill Bishop. McGraw-Hill NTC / AMA. ISBN: 0-844-23441-9
Publisher's Page, Amazon.com Page

Webonomics (1998)
by Evan Schwartz. Broadway Books. ISBN: 0-553-06172-0
Publisher's Page, Amazon.com Page

E-Commerce Management (2002)
by Sandeep Krishnamurthy, South-Western Pub. ISBN: 0-324-15252-3
Publisher's Page, Amazon.com Page

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In such cases the Distribution Calculator offers a reliable solution. The user simply enters the degrees of freedom, the test statistic or the level of signifance, and the program calculates the probability or the test statistic, respectively. The Distribution Calculator offers calculations for the normal distribution, the t distribution, the chi-square distribution, and the F distribution. As can be seen from the screen shot you may select for one-sided or two-sided tests. The probabilities beyond the critical values are colored in red.

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More specifically, a test statistic is computed with nu1 and nu2 degrees of freedom, and the result is compared to this table. For a one-sided test, the null hypothesis is rejected when the test statistic is greater than the tabled value. This is demonstrated with the graph of an F distribution with nu1 = 10 and nu2 = 10. The shaded area of the graph indicates the rejection region at the alpha significance level. Since this is a one-sided test, we have alpha probability in the upper tail of exceeding the critical value and zero in the lower tail. Because the F distribution is asymmetric, a two-sided test requires a set of of tables (not included here) that contain the rejection regions for both the lower and upper tails.

plot for one-sided test at alpha = 0.05

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