Wednesday

Good morning! I'm sorry I didn't make it in today...just not feeling 100%. I'll be back tomorrow for some more confidence intervals before our chapter 19 quiz on Friday. As much as I hate being out of school, I do like the fact that it gives you all a little more experience working on some AP multiple choice without being able to ask questions--like on the AP Exam (May 13th!)

Tonight, please complete the confidence intervals worksheet provided in class! I should have all of today's classwork graded and back to you tomorrow (thank Ms. Paige for picking it up for me)!

Friday's quiz will also include vocabulary. Here's a list if you want to get a head start studying:

• Confidence Interval: a tool we use to estimate the value of a population parameter (using sample data)
• One Proportion Z Interval: an interval used to estimate a population %/proportion (p); based on 1 sample of categorical data
• Margin of Error: the extent of the interval on either side of our statistic (p-hat); (make sure you know how it's calculated also!)
• Critical Value: z*; the number of standard errors (deviations) from the mean for a given confidence level
• 10% Condition: sample has to be less than 10% of the population
• Randomization: we want our sample to be collected at random (so it's representative); if not, proceed with caution
• Success/Failure: (n)(p-hat)>10 and (n)(q-hat)>10
• p: the %/proportion of the population (population parameter)
• p-hat: the %/proportion calculated from our sample (sample statistic)

Hopefully you all aced your assignments today! See you manana!