Wednesday HW

I MADE A MISTAKE ON THE QUIZ C ANSWER KEY I GAVE YOU IN #2! Look at my math--find my mistake and correct it on my answer key, then show it to me tomorrow, and you'll get an extra stamp or 2!

Tonight, please complete BOTH AP FR questions (if you didn't finish #3 in class today). 

You MUST also score each response and provide rationale for homework credit. Use the links below for the AP scoring rubric! (You also have this packet from class today).

I'm more interested in your rationale/scoring than anything else, so be serious about this piece! Looking at AP rubrics is one of the best ways we can prepare for our AP exam (May 12th)!

2010 Scoring Rubric: Scroll Down to #3!

• The answer they provide for part b is confusing to us...use this instead....
• The solution in the rubric looks a little weird to us…this is really just another way of stating that our sample is less than 1/10 of the population (or 1/20^th); in other words, this is another way of checking the 10% condition! So, we can still create the confidence interval because our sample of 50 songs is less than 10% of the entire population of 2,384 songs.

2010 Scoring Rubric: Scroll to #4

FRIDAY we will start class with our chapter 19 vocab quiz! 

Here's the chapter 19 vocab list:

• Critical Value
• Standard Error
• Margin of Error
• 10% Condition
• Success/Failure Condition (np>10, nq>10)
• Know which 3 conditions are checked for a one proportion z interval
• Confidence Interval
• What does the "one" in one proportion z interval refer to? (one sample!)
• Meaning of __% confidence
• Know how ME is affected...
• If n increases
• If n decreases
• If we increase our confidence
• If we decrease our confidence
• Population Parameter
• Sample Statistic
• Population
• Sample