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Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations: Added " mean time wax 1 lasts is longer (wax 1 is more effective) than the mean time wax 2 lasts" to the conclusion of example. Added condition that populations are normal.

Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations: Updated graph.  Changed "average" to "mean" where needed.

Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations:  Took out the phrase "because usually you have two setts of data."

roles updated

removed draft note

table corrections

post review edits

post review updates

Added equation tags, corrected wrong subscript for u2.

Initial publication

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American Chemical Society (ACS) Style Guide:

Dean, S.; Illowsky, B. Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations, Connexions Web site. http://cnx.org/content/m17042/1.10/, Jun 14, 2012.

American Medical Assocation (AMA) Manual of Style:

Dean S, Illowsky B. Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations [Connexions Web site]. June 14, 2012. Available at: http://cnx.org/content/m17042/1.10/.

American Psychological Assocation (APA) Publication Manual:

Dean, S., & Illowsky, B. (2012, June 14). Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations. Retrieved from the Connexions Web site: http://cnx.org/content/m17042/1.10/

Chicago Manual of Style (Bibliography):

Dean, Susan, and Barbara Illowsky. "Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations." Connexions. June 14, 2012. http://cnx.org/content/m17042/1.10/.

Chicago Manual of Style (Note):

Susan Dean and Barbara Illowsky, "Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations," Connexions, June 14, 2012, http://cnx.org/content/m17042/1.10/.

Chicago Manual of Style (Reference, in Author-Date style):

Dean, S., & Illowsky, B. 2012. Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations. Connexions, June 14, 2012. http://cnx.org/content/m17042/1.10/.

Modern Languages Association (MLA) Style Manual:

Dean, Susan, and Barbara Illowsky. Hypothesis Testing: Two Population Means and Two Population Proportions: Comparing Two Independent Population Means with Known Population Standard Deviations. Connexions. 14 June 2012 <http://cnx.org/content/m17042/1.10/>.