Study Lessons 1, 2, and 3 in my study book (if you have it) to learn the concepts involved in this assignment. That is a heck of a lot of stuff to study, but realize that Lessons 1 and 2 are reviewing all the key concepts you need to know from Stats 1. It is essential that you take the time to get a thorough understanding of Lessons 1 and 2 first. That will set you up for the whole course. The student who struggles in those concepts will never be able to progress. The student who feels comfortable with these lessons, will find that the rest of the course flows at a smooth and steady pace.
I suggest that you study Lessons 1 and 2, then do the first 10 questions on your assignment. Once you have completed those questions, return to my book and study Lesson 3 to prepare for the remainder of the assignment. You will also have to study Lesson 6! I suggest you do a light reading of Lesson 6 and take a look at the information leading up to and including my question 1, then skip along to the Binomial section of Lesson 6 and read that part up to and including question 4. Then skip along to the section called "Errors in Hypothesis Testing Revisited" on page 357. Note this is a new section in my book, so only those of you with a 2010-2011 edition (blue cover) have this part. In older editions, this info was spread over Lessons 6 and 7, and not as thoroughly discussed. This study of Lesson 6 I am suggesting will set you up for questions 16 and 17 on the assignment. Do note that you will learn Lesson 6 more thoroughly later in the course, so don't worry about mastering the concepts of Lesson 6 at this time.
Note that this entire assignment uses z, not t since they always give you the population standard deviation, σ.
When you are copying data into JMP 8 (ignore them when the keep mentioning JMP 6, they mean JMP 8, that is just how old the questions are on this assignment), first open JMP and select "New Data Table". To make sure the column headings are pasted properly, select and copy the data, then be sure to select "Edit" in the JMP toolbar and select "Paste with column names". Then your data should paste properly. JMP has a nasty habit of messing up when this is done, though. If your column contains numbers (quantitative data), make sure you double-click each column heading and confirm that the Data Type is Numeric and the Modeling Type is Continuous (JMP may have changed the Data Type to Character and the Modeling Type to Nominal).
To get JMP to make confidence intervals and test hypotheses for the mean:
Select Analyze, Distribution from the toolbar at top. Highlight the column you are interested in and click the "Y, Columns" button. Click OK. You are now taken to a window showing a histogram and stuff. To get a confidence interval, click the red triangle next to your column variable directly above the histogram to get a drop-down list and select "Confidence Interval". In the pop-up window that appears, select "Other" (even if the level of confidence you desire is in the list) and type in the level of confidence you want (in decimal form, so 95% is 0.95). Make sure "Two-sided" is selected. If you are given a value for sigma, the population standard deviation, select the "Use known Sigma" checkbox. Click OK. You will get another pop-up window where you can type in your known value for sigma (if you selected that option). A Confidence Intervals table will appear in your output screen at the bottom. To test a hypothesis, click that same red triangle you used to make a confidence interval and select "Test Mean". Type in the value the null hypothesis believes the mean to be and type in the known value of sigma if you have one (otherwise leave that value blank). Click OK. A Test Mean = Value table appears in your output where, among other things, JMP gives you the test statistic and three probability values. Those three probabilities are the P-value for the three possible alternative hypotheses. JMP will use a z statistic if you are given a sigma value to enter or a t statistic if sigma is unknown.
Prob > |z| or Prob > |t| is the two-tailed P-value.
Prob > z or Prob > t is the upper-tailed P-value.
Prob < z or Prob < t is the lower-tailed P-value.
To get rid of any outputs you don't want to copy and paste, click the red triangle and deselect the unwanted things.
To copy and paste the parts of a JMP printout you do want, select the icon on the JMP toolbar that looks like a fat white plus sign "+" (the Selection tool). You can then click various parts of the printout to select the sections you want. Copy and paste into Word or something like that.
If you are making a confidence interval by hand and have to use an unusual level of confidence, look at my question 10 in Lesson 1 for an example how to do that.
