Seminar 5 Critical Thinking Questions (40 points total):
This week for the assignment please respond to Critical Thinking: What do the “Do Not Tell” call registry survey results tell us? on page 386 of your textbook.
I’d like to help you all get started on the CT assignment. Let me walk you through that. I am also very open to us working on the CT calculations together!
We’ll set the confidence interval calculations up just like Example 3 from P. 334.
First though, we need to use Formula 7-1 on P. 333 to determine the margin of error.
We know from previous examples that a 95% confidence level corresponds to a critical value of z α/2 = 1.96.
Now we need to find the values of p-hat and q-hat. You can then subtract that phat from 1 for your qhat.
Now plug the CV and phat and qhat into the Margin of Error formula. Finally, set up your CI using phat and E values.
Hint: There is an orderly progression to these problems, and by following the order it keeps your sanity intact (and it is easier for others to follow you!). I would strongly suggest laying out your steps just like Triola shows (ie in Example 3 on P. 334). But first, include all the above values (ie P, q, p-hat, n, etc. at the front end of your calculations. Then, show the Margin of Error (E) calculations, then construct the Confidence Interval, and finally, give the results and followed by the interpretation.
If you have started on these calculations are find yourself getting stuck or confused–holler!
Keep in mind there are a number of questions to answer with this CT assignment. Don’t forget to go beyond that #1.
Question #5: Use Formula 7-2 on P. 336 to determine if the sample size is proportionate or not. Here is that formula: n= [zα/2]2 phat * qhat/ E2 . You’ll plug in the phat and qhat values and margin of error you found earlier in the assignment.
Question #6: To respond to this we could also use sample size calculations to inform our response. Use formula 7-3 on P. 336:
n= [zα/2]2 .25/ E2 =
Submitting the Assignment
Submit the assignment for grading as an attachment by clicking on the View/Complete Assignment link in the Seminars section of the course.
