Why Sample in the Census?

Slides:

Advertisements

Similar presentations

PRIME FACTORIZATION.

Advertisements

9/21/12. I can identify which factors are prime numbers. LEARNING TARGET.

/t/ / I d/ /d/ Try Again Go on /t/ / I d/ /d/

EXAMPLE 2 Using the Cross Products Property = 40.8 m Write original proportion. Cross products property Multiply. 6.8m 6.8 = Divide.

8-2 6th grade math Proportions.

© T Madas. Divide the following numbers in the ratio given 16 at 3 : at 1 : at 3 : at 1 : at 2 : at 3.

SWBAT calculate the gradient, intercepts, equation of a 2D line, and find a point of intersection in writing from two points DO Now:

1.Review When do populations grow exponentially Apply Concepts Why does exponential growth show a characteristic J-shaped curve 2.Review What is the characteristic.

Capture-Recapture Work with the idea of a sample Become familiar with representative samples Understand the capture-recapture method.

8-3 6 th grade math Solving Proportions Using Cross Products.

How many are there?.  Collection of all the organisms in an area AND the non-living parts of the environment.

Ways to Check for Divisibility Dividing By 1 All numbers are divisible by 1.

Ratio, Rate, Proportion, and Percent. Ratio  Comparison of two numbers by division  Can be written three different ways 4 to 9 4 :

John has to complete a research project on the ape population in Spain. He is trying to estimate the size of population of apes. He randomly catches 37.

BIOL 4240 Field Ecology. How many? “Estimates of abundance themselves are not valuable, and a large book filled with estimates of the abundance of every.

Ways to Check for Divisibility Dividing By 1 All numbers are divisible by 1.

POPULATION  an entire group of people or objects that you want information about. Sample  the part of the group that is surveyed. This is not new – we.

Excursions in Modern Mathematics, 7e: Copyright © 2010 Pearson Education, Inc. 13 Collecting Statistical Data 13.1The Population 13.2Sampling.

FWCO FALL2013/SPRING2014 MMRPM Summary of Effort and Catch River Resources Action Team 2014.

Nouns you can count NEXT you can use a / an in front of countable nouns Nouns that have a plural form.

How are slopes measured? SLOPE = Third: Make a ratio of rise over run and then simplify. Let’s find the slope of this line. First: Find the rise.

Ways to Check for Divisibility Dividing by 2 All even numbers are divisible by 2 Even numbers are numbers that end with either 2, 4, 6, 8, or 0.

Cricket Mark-Recapture Investigation

The Chesapeake Blues. What Happened? Inference.

Section 7.1 Ratio, Proportion and Variation Geometry.

Sampling animals. What do you remember? What is biodiversity? What is species richness? Whose formula can be used to put a figure on the biodiversity.

Ratios and Proportions Percent Change. Proportion – Statement showing two ratios as equal.

7.3 Ratio, Proportion, and Variation Part 1: Ratios and Proportions.

Raccoon and Squirrel Population Study Joel Michaelson Kurt Gajewsky Kris Mielnik.

Observing Populations Cacn Birb Andc. Direct observation is counting each member in a population. Ex: We went to a fish tank and counted all of the fish.

Proportions How to Write and Solve Them. PROBLEM: I saw at Office Depot that pencils were priced at a dozen for $1.50 How much is it for one pencil? How.

Unit 5 Populations [The end is getting nearer!]. A. CHARACTERISTICS OF POPULATIONS 1. Terms a. population – a group of individuals of the same species.

© 2012 Pearson Prentice Hall. All rights reserved. CHAPTER 4 Algebra: Equations and Inequalities.

Module 7 Lesson 13 Explore perimeter as an attribute of plane figures and solve problems.

Agenda Introduction Why have a PES? Essential features of a PES

International Studies Charter School.

Estimating Population size

Comparing Two Populations or Treatments

Modeling with proportions

C5 Population Ecology National geographic celebrates 7 billionth person on October 31, 2011 Need 1.5 Earths to support current growing population 19th.

POPULATION ECOLOGY.

Online Gifts Buy for wishes happy mother's day to yours choice and with happy gifts find here:

CHILD BEGGARS IN DAKAR 1.

Estimating Populations

Estimating 1 – 2 and p1 – p2 Section 9.4.

Concept of Independence in Dual System Estimation (DSE) Pres. 11

Characteristics of Populations

Data Organization I.

Studying Populations Chapter 1 Lesson 2.

Determining Population Size

30 A 30 B 30 C 30 D 30 E 77 TOTALS ORIGINAL COUNT CURRENT COUNT

Your calculations are a prediction

3.5 Writing Ratios & Proportion

DS6 – Sampling and Populations

DO NOT TAKE HOME, THANKS! Lesson 1.5: Populations.

Unit 2: Ecology Lesson #3: Sampling Techniques

Common Abundance Estimates

Data Organization I.

A biologist wants to estimate the total number of small fish in a relatively small lake. So, he asked a local fisherman to catch some fish with the aid.

Estimating 1 – 2 and p1 – p2 Skill 35.

C.2.10 Sample Questions.

C.2.8 Sample Questions.

Sampling Techniques Statistics.

C.2.8 Sample Questions.

ANOVA: Analysis of Variance

Section 12.1: Significance Tests in Practice

Estimating Attendance at non-gated non-ticketed events

Capture-Recapture 09/08/2019 Learning Objectives:

Divide 9 × by 3 ×

Presentation transcript:

Why Sample in the Census?

What they planned to do Normal effort Special effort Census divides the US into 7,000,000 blocks Tries to get everyone in every block Special effort Take 10,000 blocks (randomly selected) Do completely independent count Cross check the lists

Why? Capture-recapture designs Have 20 researchers (covering different regions) catch and tag fish in a lake. Say they get 40 in all. Say the next day they fish again. They catch 50 fish. 8 have tags (8 of the 40 original tags). How many fish are there in the lake? 50/(8/40) = 250 (second capture sample)/(recapture ratio)