**ISCAM2 Instructor Notes – Updates**

- Change for Fall 2014

·
More applets
converted to javascript and instructions/solutions updated, and errata
corrected

·
The context of
Investigation 2.9 was replaced. The goals are for the baseline
proportions to be small so the difference in the two conditional proportions is
difficult (or at least awkward) to interpret. We also want to make sure
there is visible skewness in the relative risk distribution to justify the
transformation. This comparison may be clearest by examining probability
plots. The term “efficacy” was also introduce but could be glossed over
quickly.

·
Investigation 3.3
was split into two investigations and the discussion reordered. The first
investigation now focuses on motivating the use of the *t* distribution
for both p-value and confidence interval calculations. The investigation
makes heavier use of two applets rather than R or Minitab simulations (though
this makes it more difficult to look at probability plots). The second
investigation gives students practice applying the *t*-procedures to the
data and drawing conclusions, and then extending to prediction intervals.

·
Reworked Investigation 1.1 to help streamline the discussion slightly.

·
Added a third classic smoking vs. lung cancer study in Investigation
2.10.

·
A few practice problems were added and a few homework problems (Ch. 2
#86, Ch. 3 #84, Ch. 4 #66)

- Changes for Winter 2014
- New Investigation 1.15 using hypergeometric distribution as probability model for sampling without replacement (optional)
- Reordered investigations in chapter 3, more focus on t-distribution with one-sample and then sampling and then randomization
- Changes for Fall 2013
- Errata from Winter 2013 have been corrected
- New (optional) material at end of Investigation 1.1 providing an introduction to standard deviation
- Slightly fuller
treatment of one-sample
*t*-procedures with Investigation 3.3 (earlier) - Replaced and reordered some contexts in Section 4.4 (more on confidence intervals, transformations moved to end)
- More integration of newer (javascript) applets, though still not taking full advantage of possible capabilities
- Included some R instructions for handling missing values, workspace functions now work with missing vlaues

- (1/22/13) iscambinomtest function has been updated to allow entry of either decimal or integer confidence levels (e.g., .95 or 95) and to reset graph window after showing confidence interval output
- Errata from Fall 2011 have been corrected
- Investigations 1.1 and 1.2 have been reworked a bit
- Optional technology instructions for importing data and producing bar graphs are now at the end of Investigation 1.1
- Investigation 1.2 does not assume technology until calculation of p-value
- Confidence intervals now refer to an interval of plausible values rather than a range of plausible values
- Investigation 1.6 has been reworked a bit and can be split into smaller chunks more easily
- Optional instructions for normal probability plots have been added to Investigation 2.1, Investigation 2.9, Investigation 3.6 (see also section of ch. 3 exercises)
- More
summary of one-sample
*t*-procedures has been added to Investigation 3.14 - Example 3.4 has been incorporated into the text
- A new function has been added to the workspace to generate boxplots using quartiles instead of hinges
- Summary function and dotplot function in workspace now allows more than 2 groups
- New javascript versions of the Test of Significance Calculator applet, which now also allows pasting in of raw data, and the Normal Probability Calculator applet, have been linked to from the data files page

*From Fall 2012*

- Continue to check for updates on errata page and posting new errata
- ISCAM Workshop updated 9/5 (text now uses "95" as the confidence level instead of ".95" and ISCAM Workshop functions expect "95" as the input value instead of ".95". Standard R functions still use ".95"
- Randomization Test for Quantitative Response applet now has separate boxes for counting above, below, and "beyond" (two-sided) inputted value.
- If you get a "disabled"/SSL message when trying to download HW solutions, you should be able to say no a couple of times and then the file will open.
- Investigation by Investigation comments for Chapter 2 updated (9/16) and small changes made to exercise files
- A bit more information added to Exercise 1
- Typos in solutions for Exercise 1 fixed
- Investigation solutions for Chapter 2 posted
- Investigation by Investigation comments for Chapter 3 posted (10/14), with exercise file, solutions to investigations and solutions to practice problems.
- Note optional additional online material (sign test, bootstrapping)
- Solutions to HW exercises still need to be posted
- Note optional HW exercises on sign test, bootstrapping, normal probability plots, one sample t procedures
- Note major typo in Investigation 3.9
- New exams for 2nd edition have been posted (password protected)
- Chapter 3 HW solutions posted (and small typo in exercise 42 fixed) and material for Ch. 4 (including HW) is now available
- Please let me know what requests you have for updates to the materials for next term!