Surveys, Experiments, and Observational Studies. In a randomized comparative experiment, the individuals are assigned to the control group or the treatment.

Slides:



Advertisements
Similar presentations
CHAPTER 9, survey research
Advertisements

Ask a Question What are we testing? Step 1. Step 2 Research your topic. Look at the past work of others to see if this problem has already been tested.
6.5 Compare Surveys, Experiments, and Observational Studies p. 414 How do you accurately represent a population? What is an experimental study? What is.
Preparing Data for Quantitative Analysis
EXAMPLE 1 Classify samples A sportswriter wants to survey college baseball coaches about whether they think wooden bats should be mandatory throughout.
Data Gathering Techniques
Decide whether each sampling method is likely to result in a biased
The number of minutes each of 26 students in a class spent to complete an obstacle course is shown below. 5,2,5,5,8,12,6,7,5,5,6,5,5,5,6,10,7,5,5,7,5,7,5,7,6,6.
Sampling Distributions
Quantitative vs. Categorical Data
Example 1: a) Describe the shape, center, and spread of the sampling distribution of. Because n 1 p 1 = 100(0.7) = 70, n 1 (1 − p 1 ) = 100(0.3) = 30,
Warm Up Lesson Presentation Lesson Quiz
Connect! What are some desired traits that breeders might want to select for in these food sources? What would breeders need to know about each trait to.
MR. GONZALEZ ALGEBRA 2 Intro to Statistics. Population and Sample What’s the difference?  A population is all the members of a set.  A sample is part.
Lesson 3-5 Getting Help to Stay Healthy. Objectives TSW summarize important health screenings, immunizations, and examinations necessary to maintain good.
The Scientific Method in Psychology.  Descriptive Studies: naturalistic observations; case studies. Individuals observed in their environment.  Correlational.
Headlines What “sells” the news?. Appealing Headlines Simplify complex issues Certainties not possibilities Quick and easy solutions.
Identify the population and the sample.
11.4 Collecting Data and Circle graphs E S: Gather and Organize Information 1.) What percent of the budget is spent on rent? 2.) How much money do the.
Defining Success Understanding Statistical Vocabulary.
1. Survey- obtain information by asking many individuals to answer a fixed set of questions 2. Case Study- an in depth analysis of the of a single individual.
Jeopardy Vocab 1Scientific Method GraphsExperi- ment Vocab 2 Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.
An Overview of Statistics Section 1.1. Ch1 Larson/Farber 2 Statistics is the science of collecting, organizing, analyzing, and interpreting data in order.
Vocabulary of Statistics Part One. Stastistics Original word came from: Original word came from: State Arithmetic.
Week 3 Warm Ups Advanced Algebra. Warm Up 8/24/15 1.Find the expected value for egg production. 2. Find the mean and standard deviation of the data as.
Surveys, experiments, and observational studies
4.2 - Experiments. Observational Studies measures variables of interest without attempting to influence the responses. sample surveys watching animals.
Biology What will we cover?  Scientific Method and Inquiry  Ecology  Cells  Genetics  Evolution  Kingdoms  Plants  Animals  Human Body.
Do What Needs to Be Done Today. The secret of happy successful living is to do what needs to be done now, and not worry about the past or the future.
CHAPTER 9: Producing Data Experiments ESSENTIAL STATISTICS Second Edition David S. Moore, William I. Notz, and Michael A. Fligner Lecture Presentation.
 Experimentation. Bell ringer  Do you think listening to music while you read interferes with reading comprehension? Explain.
Lecture PowerPoint Slides Basic Practice of Statistics 7 th Edition.
Notes.  A population is a large group of individuals you want information about.  An individual is defined to include people, animals, or objects that.
Studying Populations/ Population Density. How many beans are in the jar? With your lab partner…Discuss a way you can find out how many beans are in the.
4/25/2017 Section 11.8 Samples and Surveys.
Essential Questions How do we estimate population means and proportions and develop margin of error from simulations involving random sampling? How do.
Unit One Section Two: Scientific Method 1.State The Problem: The investigator is identifying a problem and making observations as to the cause of the problem.
The Scientific Method aka: Scientific Inquiry. What is Science? The goal of science is to investigate and understand the natural world, to explain events.
CHAPTER 9 Producing Data: Experiments BPS - 5TH ED.CHAPTER 9 1.
Warm-Up Decide whether each sampling method is likely to result in a biased sample. 1.The first 30 students to arrive at school are asked whether they.
Holt McDougal Algebra 2 Surveys, Experiments, and Observational studies How do I focus on the commonalities and differences between surveys, experiments,
Sampling Distributions 9.2. When a survey is used to gather data, it is important to consider how the sample is selected for the survey. If the sampling.
Scientific Method Chapter 1-1. What is Science?  Science – organized way of gathering and analyzing evidence about the natural world  Described as a.
Producing Data: Experiments BPS - 5th Ed. Chapter 9 1.
Silent Do Now (5 minutes) *Before you begin, grab a new weekly sheet and take out your homework!  An opinion poll calls 2000 randomly chosen residential.
Populations and Samples. Warm Up
Today’s DO NOW DO NOW – You are conducting an experiment to answer the question, “Does water temperature effect the rate at which fish eggs hatch?” Identify.
Statistics I ( 2-1). What is Data? Consist of information coming from observations, counts, measurements, or responses. “People who eat three daily.
Name:__________ warm-up 12-2 HEALTH CLUBS At a heath club, a random sample of members are asked some questions about dieting. Classify the sample as simple,
BSHS 382 MASTER Leading through innovation/bshs382masterdotcom.
Holt McDougal Algebra 2 Surveys, Experiments, and Observational studies Warm Up Identify the population and the sample. 1. Fifty teenagers are randomly.
Graphs... Can describe real situations. Show relationships between two variables.
RDG 410 Week 3 Individual Assignment Integrated Unit Matrix or Graphic Organizer Check this A+ tutorial guideline at
BPA 303 Week 1 Individual Assignment Theories Paper - Resources: University Library - Write a 700- to 1,050-word paper analyzing theories and approaches.
The Scientific Method.
6.5 Compare Surveys, Experiments, and Observational Studies
Homework Log Thurs 5/26 Lesson 11 – 8 Learning Objective:
Do now: Identify the population and sample
8-3 Warm Up Lesson Presentation Lesson Quiz
Samples, Experimental , & Observational Studies
Samples, Experimental , & Observational Studies
Studying Populations/ Population Density
SCIENTIFIC METHOD.
Do Now: SWBAT: Apply the three principles of experimental design.
Vocabulary of Statistics
Surveys, Experiments, and Observational Studies
The Nature of Science.
8-3 Warm Up Lesson Presentation Lesson Quiz
Samples, Experimental , & Observational Studies
Practice Free Response Question
Presentation transcript:

Surveys, Experiments, and Observational Studies

In a randomized comparative experiment, the individuals are assigned to the control group or the treatment group at random, in order to minimize bias.

Example Explain whether each situation is an experiment or an observational study. A. A researcher wants to know if a soil additive makes a fern grow more quickly. He grows one specimen in treated soil and one in untreated soil. B. To find out whether car accidents are more likely on rainy days, a researcher records the weather conditions during 50 randomly selected accidents for the past year. C. A scientist measures the height of 20 birds’ nests, and counts the number of eggs to see if there is a relationship.

Example The study described in the report is a randomized comparative experiment. Describe the treatment, the treatment group, and the control group.

Example The study described in the report is a randomized comparative experiment. Describe the treatment, the treatment group, and the control group.

Example Explain whether the research topic is best addressed through an experiment or an observational study.

Example Classify each method as a survey, an experiment, or observational study, and explain which would be most reliable. Method A:Method B:Method C: Choose 50 people who have at least one serving of soy a day and 50 who don’t, and check their cholesterol levels. Randomly choose 100 people. Ask how many servings of soy they have a week, and ask if their cholesterol levels are high. Randomly choose 50 people to eat at least one serving of soy a day, and 50 people not to, and monitor their cholesterol levels.

Example Classify each method as a survey, an experiment, or an observational study, and explain which would be most reliable.