Today was an extra day of practice for 1-sample means and 2-sample means. The following two worksheets are the homework due next time (no bookwork!):

• Worksheet 8.3 - What Sample Size is Needed
• Worksheet 8.3 - Inference Worksheet #1 (make sure you follow the instructions!)

Here are the notes for day 9 (2-sample t-tests and t-intervals):

• Notes 8.2 - Inference with Two Sample Means DOWNLOAD notes

Here are the notes for the first day of inference with means (chapter 23 in the text). The big wrinkle is the introduction of the t-tables (the back-side of the z-tables handout!).

• Notes 8.1 - Inferences with Means (color slides) | B&W slides for printing
• Formula charts: z-tables, t-table, and chi-sq table (t-table is on the left-hand side of page 2)
• Updated 4th SW Calendar (changes start Jan 31)

Here is the review for the first exam of the second semester (scheduled for M/Tu, Jan 23/24) over Inference with Proportions.

• Review Unit VII (Inference with Proportions) | ANSWERS ONLY Tutorials Note: Mr. Ziebell and Mr. Youn will both be available on Monday morning for tutorials before the exam.)

If you need to refer to the formulas, here is a guide for the foldable for this unit:

• Foldables - Proportions

Here are the notes for 2-proportion z-intervals and z-tests (chapter 22 in the text).

Important note: If you use the calculator shortcuts to perform these problems, you are NOT required to write the formulas and show the work (you are required, however, to name the procedure in the problem). Anything in orange ink in the following notes, therefore, is optional.

• Notes [WEB] 7.4 - Inference with Two Proportions

And if you need to finish your foldable for the proportions unit, here are the slides to walk you through that:

• Powerpoint 7.x - Foldables - Proportions