PPT-Proportions

Ratios Comparison of two itemsobjects Written one of 3 ways As a fraction With colon using word to When writing a ratio First thing you talk about is the numerator Second thing you talk about is the denominator. 1 A blouse that regularly sells for 2850 is on s ale for onethird off What is the sale price of th e dress 2 If 14 out of 24 students in a college class are men then to the nearest tenth of a percent what percent of the class is composed of men 3 A . 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…. . Pythagoras (560-480 BC), the Greek geometer, was especially interested in the golden section, and proved that it was the basis for the proportions of the human figure. He showed that the human body is built with each part in a definite golden proportion to all the other parts.. Proportions. What are proportions?. - If two ratios are equal, they form a proportion. Proportions can be used in geometry when working with similar figures.. What do we mean by similar?. - Similar describes things which have the same shape but are not the same size.. Remember to Silence Your Cell . Phone and Put It In Your Bag!. Proportional Variance. Two quantities . vary proportionally. iff as their corresponding values increase or decrease, the ratios of the two quantities are always equivalent.. Statistics. What you will learn. Be able to state the null and alternative hypotheses for testing the difference between two population proportions.. Know how to examine your data for violations of conditions that would make inference about the difference between the two population proportions unwise or invalid.. Section 2-8. Goals. Goal. To find missing lengths in similar figures.. To use similar figures when measuring indirectly.. Rubric. Level 1 – Know the goals.. Level 2 – Fully understand the goals.. 3/28/17. How do we write ratios?. How do we write and simplify rates?. How do we decide whether two ratios/rates are proportional?. Today We’ll Discuss. Definition:. The . ratio. of two numbers . University. .. .. .. .. .. .. .. .. .. .. .. SLIDES. . .. . BY. Chapter 12. . Comparing Multiple Proportions,. Test of Independence and . Goodness of . Fit. . Testing the Equality of Population Proportions. Difference Between Proportions. Sometimes we want to see if there is a significant difference between independent groups.. Control group vs. treatment group or placebo group. Men vs. women. Last year vs. this year. AP Statistics. Unit 5. The Central Limit Theorem for Sample Proportions. Rather than showing real repeated samples, . imagine. what would happen if we were to actually draw many samples.. Now imagine what would happen if we looked at the sample proportions for these samples. . Textbook Pages 430-435. Objective. I can solve scale drawing problems using proportions.. Vocabulary. Scale Drawing: . is the same shape but not the same size. A map is a scale drawing. The units are very important.. Objective: You will analyze measures and shapes in order to draw facial features in proportion.. DRILL:. Get a mirror and paint pump to set up mirror . (on counter near sink.). Take 10-15 minutes to attempt a first portrait. Chapter 8: Inference for Proportions Lecture Presentation Slides Macmillan Learning © 2017 Chapter 8 Inference for Proportions 8.1 Inference for a Single Proportion 8.2 Comparing Two Proportions