PPT-Two-Sample Proportion

zTest Say that 10 times fast Minor differences Like with a 1sample proportion zTest we will use p instead of mu for our hypotheses Like a 2sample zTest we will have two things equal to one another rather than a parameter equal to a number. . To test claims about inferences for two proportions, under specific conditions. 8.4: two-proportion inference tests. Proportions observed in independent random samples . are. independent. Thus, we can add their variances. So…. Introducing Hypothesis Tests. Review. A 99% confidence interval is . wider than a 95% confidence interval. . narrower than a 95% confidence interval. . the same width as a 95% confidence interval. Confidence Intervals. (application of the Central Limit Theorem). Sections 5.1, 5.2. Introduction and Confidence Intervals for Proportions. Lecture Unit 5 Objectives. Construct . confidence intervals. Sixth Edition. Chapter 6. Confidence . Intervals. Copyright © . 2015, 2012, 2009 . Pearson Education, Inc. All Rights Reserved. Chapter Outline. 6.1. Confidence Intervals for the Mean (. . Known. Sample Proportions. We ended last class with the following example:. A person has a 5% chance of winning a free ticket in a state lottery. If she plays the game 12 times, what is the probability she will win more than 1 free ticket?. Definition. The . relationship . between objects, or parts, of a whole. . in artwork.. Scale (or size) . refers to the size of an object (a whole) in relationship to another object (another whole). In art the size relationship between an object and the human body is significant. In experiencing the scale of an artwork we tend to compare its size to the size of our own bodies. two-proportion inference tests. Chapter 22. Proportions observed in independent random samples . are. independent. Thus, we can add their variances. So…. The standard deviation of the difference between two sample proportions is . 2/29/12. Single Proportion, . p. . Distribution. Intervals and tests. Difference in proportions, . p. 1. – p. 2. . One proportion or two?. Distribution. Intervals and tests. Section 6.1, 6.2, 6.3, 6.7, 6.8, 6.9. Yawn Seed?. Subject. Yawned?. Yes. No. Total. Yes. 10. 4. 14. No. 24. 12. 36. Total. 34. 16. 50. Trial. Number who yawned in yawn seed group. Number who yawned in no yawn seed group. Difference in proportions (yawn. What is hypothesis testing?. A statistical hypothesis is an assumption about a population parameter. This assumption may or may not be true. . The best way to determine whether a statistical hypothesis is true would be to examine the entire population. Since that is often impractical, researchers typically examine a random sample from the population. . Day 19. A new example, with less information:. Now I want to know about the average height of three year old apple trees. A random sample of 60 trees gave us a standard deviation of 2.8 inches (so we’ll assume . Click the mouse button or press the Space Bar to display the answers.. What are the four parts to a confidence interval problem?. What three things must the interpretation cover?. What three things affect the size of the margin of error?. Inference for a Population Proportion Section 12.1 AP Registration Deadline: March 17 th Late Fee ($50): March 18 th – 24 th Financial Aid Application Due: March 1 st Remember Conditions for Inference 5th Hour. Mr. Selvaag. 2016. . Gabe Mersy. Ellie McKinney. Max Dodge. Are there certain keys in popular music that are more common than others?. ‹#›. Introduction. - Background -. We want to investigate whether there is a difference in the proportion of all Multi-Platinum songs in the U.S. .