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Today’s Schedule Reading Activity (10 minutes) Short Lecture (20 minutes) HW Discussion (30 minutes) Hershey’s Kiss

Today’s Schedule Reading Activity (10 minutes) Short Lecture (20 minutes) HW Discussion (30 minutes) Hershey’s Kisses Fun: Creating Confidence Intervals (30 minutes) Debrief, Questions?. A Marsden Giberter (10 min).

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Today’s Schedule Reading Activity (10 minutes) Short Lecture (20 minutes) HW Discussion (30 minutes) Hershey’s Kiss

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  1. Today’s Schedule • Reading Activity (10 minutes) • Short Lecture (20 minutes) • HW Discussion (30 minutes) • Hershey’s Kisses Fun: Creating Confidence Intervals • (30 minutes) • Debrief, Questions?

  2. A Marsden Giberter (10 min) Glis was very fraper. She had dernarpenFarfle’smarsden. She did not talp a giberter for him. So, she conlanted to plimp a marsden binky for him. She had just sparved the binky when he jibbed in the gorger. “Clorstymarsden!” she boffed. “That ‘s a crouistishmarsden binky,” boffedFarfle, “but my marsden is on Stansan. Agsan is Kelsan.” “In that ruspen,” boffedGlis, “I won’t wankyour giberter until Stansan.” • Why was Glisfraper? • What did Glisplimp? • Who jibbed the gorger when Glissparved the blinky? • Why didn’t GliswankFarfle his giberter? • Why did we do this activity? How does this relate to AP Stat?

  3. Points: Being able to answer the question does not demonstrate understanding of the material! Use context clues and what is given to answer the question.

  4. Section 10.1 Confidence Intervals “Interphone study finds hint of brain cancer risk in heavy cell-phone users”- ScienceNews

  5. Q: What is a Confidence Interval? A: An estimate for a parameter! Statement: I took a SRS of 500 American high school students and am 95% confident that the mean SAT score of all high school students in the US is between 840 and 1010. Interpretation: 95% of the time, if I repeat this method, I will get an interval that contains the true mean SAT score of all American high school students... but I don’t know if my specific interval contains it or not!

  6. How do I construct a Confidence Interval?

  7. Q: What is z* and how do we find it? A: It is the number of standard deviations away from the mean to catch probability C under the normal curve. Use Table A or C in your book! Let’s practice finding z* values for: 98% Confidence 90% Confidence 64% Confidence 2.326 1.645 0.92

  8. Think about this: What happens to our CI when we increase sample size? What happens to our CI if we change the confidence level?

  9. Let’s look at the 10.1 Homework Make sure your group can EXPLAIN clearly with correct notation, formulas, and context the problem you are assigned

  10. Hershey’s Kisses(Use a blank sheet of paper for this activity!) Objectives: -To create a 95% Confidence Interval for the probability that a Kiss will land upright -Predict how the Confidence Interval will change as sample size and confidence level change

  11. Come Draw your Confidence Interval on the Board

  12. Answer these Questions and Turn them in to me by the End of Class: • Interpret the confidence interval you created (ie: explain to someone who knows no statistics what it means) • What would happen to the interval if we chose a 90% confidence level? Why? • What would happen to the interval if we used a bigger sample size? Why?

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