III. Testing the Difference Between Two Means: Using the z-Test
- Home prices in two different locations are shown below. At α=0.01 is there enough evidence to reject the claim that the average cost in both locations is the same?
|Location A||Location B|
|= $93,430||= $98,043|
|= $5,602||= $4,731|
|= 35||= 40|
- National and local ACT scores are shown below. At α=0.05, can we conclude that the local scores are below the national average?
|National ACT score||ACT score|
|= 21.4||= 20.8|
|= 3.0||= 3.0|
|= 1,000||= 500|
Week 6 Homework Assignments
- This week we must read:
Lane et al. Chapters 11, 12, & 13
Textbook #1: Lane et al. Introduction to Statistics, David M. Lane et al., 2013.
( http://onlinestatbook.com/Online_Statistics_Education.pdf )
Illowsky et al. Chapters 9 & 10
Textbook #2: Illowsky et al. Introductory Statistics, Barbara Illowsky et al., 2013.( http://openstaxcollege.org/files/textbook_version/hi_res_pdf/15/col11562-op.pdf )
- Do the five problems listed in the table below.
- Please submit them in your Assignment Folder for grading.
|Lane et al.||11||18||397||Type I, II errors|
|12||3||441||Two Independent Samples|
|Illowsky et al.|| 9