TEST TOMORROW!

There is a small chance I will be out tomorrow (depends what happens at Lincoln's doctor appointment today). If I am absent the plan is the same--test tomorrow. Be responsible. Ask the sub (nicely) to immediately pass out the test and formula sheets so you have the full period. If you are not in attendance in Stat, but are in your other classes, you will be given a 0 on the test.

The test tomorrow is on "all things t!" (chapters 23-25)

• All types of t tests, t intervals, and any associated content is free game!
• The best tool you have to review is your packet (from Friday).

Here are the answers to the "All Things T" review packet we started today. 

1. E (answer must include a comment on the mean or average caloric intake!)
2. B (as n increases the standard deviation of the distribution decreases; so, as n increases, the distribution is less spread out)
3. C (we're comparing the number of eggs in the summer/winter for the same duck!)
4. E (in reality (in fact) the null is true, but our test suggests the Ha is true)
5. D (remember to look up t*--don't use z*!)
6. C (vocab: p-value = the probability we see our observed data GIVEN the null is true!)
7. D (look at your ch. 23 notes--you need to know these characteristics of the t-distribution!)
8. C (in reality (in fact) the alternative is true, but our test does not show this)
9. D (remember that we use a confidence interval to draw conclusions about a population parameter (mean or proportion)--this question is an example of interpreting the confidence LEVEL)

• All open ended answers below:

On Wednesday in class we'll get back to chi-squared--tomorrow I'll post the notes we took today for anyone who was out (tonight just worry about studying).

Hey...I think we're going to start class on Wednesday with a matching vocab quiz! 

• 19 words, 20 definitions (one word has two definitions). STUDY! Ace this. 
• Most of this vocab appeared on past quizzes (chapters 19-22), so use those to study!
• Much of this vocab will be used within Tuesday's test questions, so studying the vocab is also studying for Tuesday!
• Here's the vocab you may see Weds so you can get a head start studying:
1. Confidence Interval
2. Critical Value
3. Meaning of confidence level
4. Standard Error
5. Margin of Error
6. Hypothesis Test
7. Null Hypothesis
8. Alternative Hypothesis
9. P-Value
10. Standardized Test Statistic
11. Alpha/Significance Level (2 definitions...)
12. Beta
13. Power
14. Fail to Reject Ho
15. Reject Ho
16. One Tailed Test
17. Two Tailed Test
18. Type I Error
19. Type 2 Error

And here's the plan leading up to the AP exam!

• Friday: All things t review!
• Monday: Start chapter 26
• Tuesday:  "Inferences for Means" unit exam 
• Wednesday - Friday: Finish chapter 26 (chi squared)
• Week of 4/30-5/4: Cover chapter 27 (last one)--t tests and intervals for slope
• Monday 5/7 to Friday 5/11: AP exam review
• Monday 5/14 to Wednesday 5/16: AP exam review
• Thursday 5/17: AP STAT EXAM!