PPT-SWBAT: Construct and interpret a confidence interval

for a population proportion Do Now A confidence interval is centered around a I Parameter II Statistic III Measure of Variance A I only D I and II only. When I cover the entire population I get to know the truth – precisely.. That means that when my sample size is high I get a more precise answer.. That means that when my sample size increases my preciseness increases. Excel. GrowingKnowing.com © 2011. 1. GrowingKnowing.com © 2011. Estimates. We are often asked to predict the future!. When will you complete your team project?. When will you make your first million dollars?. . Interval. You. . sample. 36 . apples. . from. . your. . farm’s. . harvest. of . over. 200,000 . apples. . . The. . mean. . weight. of . the. . sample. is 112 . grams. (. with. 40 gram . Intervals for Proportions. Ch. 19 . Notes. AP Statistics. Chapter 19 Textbook HW. p.455. #2,4,6,13 (Goal for Tonight). #7,8,14,18,22,26,30,32,35,36. P. 443 Graphs. Inference. To infer means to draw a conclusion.. http://pballew.blogspot.com/2011/03/100-confidence-interval.html. Statistical Inference. 2. Sampling. Sampling Variability. What would happen if we took many samples?. 3. Population. Sample. Sample. Sample. GrowingKnowing.com © 2011. 1. GrowingKnowing.com © 2011. Estimates. We are often asked to predict the future!. When will you complete your team project?. When will you make your first million dollars?. Section 8.1. Confidence Intervals: The Basics. After this section, you should be able to…. INTERPRET a confidence level. INTERPRET a confidence interval in context. DESCRIBE how a confidence interval gives a range of plausible values for the parameter. John Krickl. Glenbrook North High School. Northbrook, IL. jkrickl@glenbrook225.org. DUALITY STICKS. Motivation. “. Using the same sample, a two-tailed hypothesis test with significance level α will . Do Now:. Do heavier cars really use more gasoline? In the following data set, . x. is the weight of some randomly selected cars (in hundreds of pounds), and . y. is the gas mileage (in mpg) for that car. This data set comes from . Confidence Intervals on . and. An interval estimator is a formula that tells us how to use sample data to calculate an interval that estimates a population parameter.. The confidence coefficient is the probability that an interval estimator encloses the population parameter.. Chapter 6 Confidence Intervals Sections 6-1 and 6-2 Confidence Intervals for Large and Small Samples   VOCABULARY: Point Estimate – A single value estimate for a population parameter. Confidence Intervals for a Population Proportion Section 8.3 Objectives Construct a confidence interval for a population proportion Find the sample size necessary to obtain a confidence interval of a given width Essential Statistics 2E William Navidi and Barry Monk Confidence Intervals for a Population Proportion Section 7.3 Objectives Construct a confidence interval for a population proportion Find the sample size necessary to obtain a confidence interval of a given width Special Topics. A 95% Confidence Interval. Now, in plain English…. What this is saying is that a 95% confidence interval is an interval created to estimate what (where) the true parameter might be..