Stat 1000: Tips for Assignment 12

Published: Tue, 11/22/11

 
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If you are taking the course by Distance/Online (Sections D01, D02, etc.), click here for my tips for your Assignment 12.
 
If you are taking the course by classroom lecture (Sections A01, A02, etc.), click here for my tips for your Assignment 12.
 
Tips for Classroom, Old-Fashioned Paper Assignment 12
 
There is no Assignment 12 for those taking Classroom Lecture sessions.
 
Tips for Distance/Online Web Assign Assignment 12
 
Study Lesson 11: Inference for Proportions in my book to prepare for this assignment.
 
Question 1 is just the rule of thumb; np > 10 and n(1-p) > 10.  Simply type "yes" or "no" in the box in each case.
 
Question 2 is just p-hat bell curve stuff.  Take a look at my question 10 in Lesson 6 for the appropriate approach.  Note that part b is using the Inverse-Square Relationship that I discuss in Lesson 8, question 8.
 
Question 3 is a standard confidence interval for the proportion question.
 
Question 4 is both a confidence interval and a sample size question using the proportion formula I teach in Lesson 11.  Note that I show you how to get z* for an unusual level of confidence back in Lesson 8, question 10.  Also note that the margin of error of any confidence interval is everything to the right of the "+/-".  The last part of the question wants you to use the conservative approach when deciding what to use for p*.
 
Question 5 is just a standard hypothesis test for proportions as taught in Lesson 11.

Question 6 is just more practise at the concepts in Lesson 11.