Wednesday

To study for the test:
1-prop z-interval (Ch. 19 #21)
**Check conditions
**Write formula (but use calculator)
**Interpret interval
**Interpret level

1-prop z-test (Ch. 20 #15)
**The whole green sheet
**2 sentence conclusion
**Interpret p-value

Changing n and z* (Ch. 19 #7)

Calculate sample size (Ch. 19 #25a)
Don't forget to round up!

Explaining Errors and Power (Ch. 21 #7 & 9a)

Sampling Distribution (pink test)

Changing alpha, n and the true answer
(Ch. 21 #9bcd and #3)

Connecting intervals and tests
**Is po in the interval?
**What does that tell us?

Tuesday

Do one perfect confidence interval and one perfect green sheet (hypothesis test).

Monday, Feb 26th

HW: Ch. 21 #8, 10, 13-16.
15 and 16 should be on a split green sheet.

Friday

Ch. 21 #7 and 11abcd

Thursday

Group test. If you missed it, you'll have to take your individual score instead.

Wednesday

Ch. 20 #8
Ch. 20 #21 on a green sheet (no CI needed).

Tuesday, Feb 20th

CW:  Ch. 20 #12
HW:  Ch. 20 #11, 19
Mega-quiz on Friday!

Thursday

IMPORTANT Classwork: Ch. 20 #1, 7, 16
Homework: Ch. 20 #17
If you have been absent Wed. or Thur., you need the CW and HW to get a 4 on your stamp sheet. Thanks!

Wednesday

Today we started our last big topic of the year.
CW:  Ch. 20 #10
HW:  Ch. 20 #9

Tuesday, Feb 13th

Well folks, here's the end of Ch. 19:  #8, 23 and 25.
Make sure and show me some work on #23 and 25!!!

FRIDAY!!!

Today we learned how to put a frequency table into our calculator.  (two lists).
Then we learned that you can graph it and find all the stats.  This is a handy tech tip that is not required, but might come in handy for the AP test.  Especially in Chapter 16, where the expected value and standard deviation formulas can take lots of calculator work, this tech tip can be useful. 

There will be an extra credit question on our next test regarding this topic.

If you want to read about this TI-Tech Tip go to:

**Page 43, last paragraph
**Page 68, last paragraph
**Page 313, the whole Tip

Thursday

Ch. 19 #4, 14, 18
Are you checking conditions?
Are you showing the formula AND using your calculator?

Wednesday

Ch. 19 #17

Tuesday, Feb. 6th

We had a test on Monday.  I know, it was hard.  Ch. 18 always is.  The vocabulary of the questions is killer.  The good news is:  you just took the hardest test of semester 2.  It all gets easier from here.  We start Chapter 19 on Wednesday.

Tuesday classwork/homework:  Ch. 4 #9, Ch. 5 #23, 25, 28
CUSS'ing practice!
Quiz on these problems, first thing Wednesday!

Test on Monday...

Study your:
**Ch. 17 Quiz
**Ch. 18 #9
**Ch. 18 #27
Be able to state the CLT.

See you soon!

Error

There are now two posts that say "Wednesday".  22, 24 and 28 and the article is for Thursday, due Friday.

Thursday--a little help

22a)  13.7%
22b)  31.9"
22c)  What's shape?  ______
What's the mean?  _____
What's the sd? ______ (hint:  something divided by the square root of something)
22d)  0.005

24a)  skewed right--you can't stay for less than zero and a few people will stay a long time.
24b)  The CLT will guarantee normality for large sample sizes.  For individuals, we don't have a clue how to calculate probabilities for skewed distributions.

28a)  4.78%
28b)  (1 - 0.0478)^3 = 0.863
28c)  Like 22c above...
28d)  Basically zero

Wednesday homework

Ch. 18 #22, 24, 28 + Article #9

Read below for a little help with these evens!