Stat 1000: Assignment 12 Tips (Distance/Online Sections)

Published: Wed, 04/03/13


 
My tips for Assignment 12 are coming below, but first a couple of announcements.
 
Please note that my final two-day review seminar for Stat 1000 will be on Saturday, Mar. 30 and Sunday, Apr. 7 (eight days later), in room 100 St. Paul's College, from 9 am to 6 pm each day.  This seminar will cover the lessons in Volume 3 of my book.  I expect to also have time on Day Two to go through a Sample Final Exam.
 
Did you miss Day One of the seminar?  I have a special offer on my audio podcasts for students who attend at least one of Day One or Day Two of the seminar.  Of course the audio is available to purchase even if you do not attend the seminar at all.  Click here for more info:
Save up to $20 on Grant's Audio Podcasts (meaning they cost less than $1 per hour) 
 
For more info about the seminar, and to register if you have not done so already, click this link:
Grant's Exam Prep Seminars Info and Registration 
 
Did you read my Tips on How to Do Well in this Course? 

Make sure you do:  Tips on How to Do Well in Stat 1000 
 
Did you read my Tips on what kind of calculator you should get?
Tips on what calculator to buy for Statistics
 
Did you miss my Tips for Assignment 11?
Tips for Stat 1000 Distance Assignment 10
 
If you are taking the course by Classroom Lecture (Sections A01, A02, etc.), there is no Assignment 11.
 
Tips for Assignment 11 (Distance/Online Sections D01, D02, D03, etc.)
  
Don't have my book?  You can download a free sample containing Lesson 1 at my website here:
Grant's Tutoring Study Guides (Including Free Samples)
 
Study Lesson 11: Inference for Proportions in my book to prepare for this assignment.
 
You will be using Tables A and D while learning this lesson and doing this assignment.  Here is a link where you can download the tables if you have not done so already:
Table A
Table D 
 
Question 1 is just the rule of thumb; np and n(1-p) must be at least 10 each.  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 (those of you with an older book may have the p-hat bell curve stuff as question 1 of Lesson 10).  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 (like my question 1 in Lesson 11).  They want you to type the lower and upper limits of the confidence interval in the respective boxes.
 
Question 4 is both a confidence interval and a sample size question using the proportion formula I teach in Lesson 11.  Recall 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 the number you write after the "+/-" (Estimate +/- Margin of Error).  Which is to say, it is z* multiplied by the standard error of p-hat.  The last part of the question wants you to use the conservative approach when deciding what to use for p*.  Do not use the p-hat you computed earlier in the question.
 
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 (and concepts about confidence intervals and hypothesis testing in general).  Everyone gets different questions here.