BIAS?. Essential Question: SPI 606.5.3 How can you determine whether or not a sample is biased?

Slides:

Advertisements

Similar presentations

Populations and Samples

Advertisements

Week of Nov 4 Tues Thur.

Are You Smarter Than a 5 th Grader? Are You Smarter Than a 6 th Grader? 1,000,000 Samples Biases Line Plot Frequency Table Cumulative Frequency Mean.

Splash Screen Example 7-4b Objective Predict the actions of a larger group by using a sample.

Chapter 12: Statistics and Probability

Populations and Samples

MBF3C Lesson #2: Collect & Analyze Data

Statistics E1 Types of Data. Data - factual information usually gathered and analyzed to aid in making a _______ decision Types of Data Quantitative:

Bias Sampling. 2 Terminology Population: group about which information is desired. Sample: smaller group of people Random: Sample: everyone gets an equal.

EXAMPLE 1 Classify samples A sportswriter wants to survey college baseball coaches about whether they think wooden bats should be mandatory throughout.

Warm Up Match each definition of one of the following words.

8-2 Data Gathering Warm Up Lesson Presentation Lesson Quiz

7.5 (purple) Select and Draw Conclusions from Samples Statistics Test: Oct. 20 (Wednesday)

Bias or Non Bias. Essential Question: ( ) How can you determine whether or not a sample is biased?

Sampling Methods Algebra II.

Splash Screen. Lesson Menu Five-Minute Check (over Chapter 11) Then/Now New Vocabulary Example 1:Real-World Example: Classify a Random Sample Example.

Details of the Day EQ: How does probability effect outcomes?I will be able to… Activities: Warm-up Review homework Notes: Wed: Quiz 6-3 and 6-4 Class work/

Populations and Samples

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Warm-Up Make a list of your final grades from your last report card (You should have 7). Find the mean and standard deviation of your data set. Then determine.

7.5 Select and Draw Conclusions p Vocabulary Population: group you want info. about Sample: part of population Self-selected sample Systematic sample.

Surveys Are a way to gather data. Can be used to gather facts or opinions from people. In order for the survey to be valid, each participant must be asked.

Populations and Samples

Parameters VS. Statistics and Samples & Census How do we compare statistics and parameters? M2 Unit 4: Day 3.

Using Resources Natural vs. Energy. Resources: Something we use. Something that can provide us ___. – Energy – Money – Help – What else???

7.5 Select and Draw Conclusions p Vocabulary Population: group of people that you want information about.

Honors Advanced Algebra Presentation 1-3 SAMPLING METHODS.

Holt CA Course Identifying Sampling Errors and Bias Warm Up Warm Up California Standards California Standards Lesson Presentation Lesson PresentationPreview.

Math 7/8 Misleading Graph Practice

Welcome Back! You will be able to recognize different sampling techniques. You will be able to understand bias and variability. You will be able to understand.

Aim: What are the types of surveys and sampling techniques used by researchers?

Lesson 10.7 Concept: How to compare and select samples of a population. Learn about different methods of sampling. Guidelines: There are different sample.

Unit 8. one variable What is univariate data? the major purpose of univariate analysis is to describe one variable central tendency: mean, mode, median.

7.5 Select and Draw Conclusions p Vocabulary Population: group of people that you want information about.

Basic Methods of Sampling Random Sampling Selected by using chance or random numbers Each individual subject (human or otherwise) has an equal chance of.

USE AND MISUSE OF STATISTICS Algebra/Data Analysis HSA Objectives 1. Students will be able to make informed decisions and predictions based on data from.

Statistics Population/Sample Survey. Statistics Practice of collecting and analyzing data to make future decisions. For example, Lays Potato Chips offers.

7.5 Select and Draw Conclusions from Samples 7.3 and 7.4 HW Quiz: TOMORROW Quiz: Friday Test: August 27.

How can random samples be used to make inferences about a population?

QUESTION 1 Every sixth person in the school cafeteria was asked to name where he or she would like to go for the school’s spring outing. Fifteen chose.

Splash Screen. 1.A 2.B 3.C 4.D Five Minute Check 1 A.309 B.479 C.527 D.637 A survey of high school students said that 63% planned on taking college courses.

Lesson 8-7 Using Sampling to Predict. Definitions Sample - A small group, it is representative of a larger group, called a population.

The student council wants students to help decide on a theme for a costume dance. Students can choose one of the councils three ideas from the options.

13.2 Surveys and Samples SWBAT identify populations and samples for surveys SWBAT distinguish biased from unbiased samples SWBAT identify and distinguish.

Data Collection and Sampling Techniques.   Data can be collected in a variety of ways. One of the most common methods is through the use of surveys.

Topic II Statistic. Vocabulary  Parameter : In a statistic study, data are collected and used to answer questions about a population characteristic.

Warm-Up Find the Mean Median and Mode of the following data sets: 1. 12, 10, 9, 11, 12, 5, 7, 9, 8, 10, 15, 9, , 10, 9, 11, 12, 5, 7, 9, 8, 10,

By: Noah St.Onge-Colwell. Population?  The population I decided to go with was students from FHS. I decided to pick four students from each grade and.

Kinds of Samples Statistics is still fun. Random – Choose your population - 7 th graders/7 th grade teachers/7 th grade parents. – Put all the names in.

How does specialization encourage trade between countries?

Interpreting Data Lesson 13. True, but… Conclusions drawn from data may be correct, but they can also be misleading. You need to carefully analyze and.

Lesson Menu Main Idea and New Vocabulary Concept Summary: Unbiased Samples Concept Summary: Biased Samples Example 1:Determine Validity of Conclusions.

Populations and Samples. Warm Up

8-1 Random Samples and Surveys. Video Tutor Help Identifying a Random Sample Khan Academy.

MATH Section 6.1. Sampling: Terms: Population – each element (or person) from the set of observations that can be made Sample – a subset of the.

By: Raiyah and Adrienne CHAPTER: 11 STATISTICS.  If a company is bias towards their product it’ll make the consumers want to buy their product over any.

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes 1.

Lesson 11.3 Collecting Data - Sampling Methods (Day 1)

Lesson 13.5 Analyze Surveys and Samples

How do I study different sampling methods for collecting data?

Lesson 12.8 Extension Populations and Samples

Main Idea and New Vocabulary Concept Summary: Unbiased Samples

Examples Sampling, Biased vs. Unbiased

Conducting Surveys.

Statistically speaking

Algebra 2 Normal Curve Analysis Extra Practice

6.4 Select and Draw Conclusions from Samples

Review Question Give an example of a statistic.

Randomization and Bias

Presentation transcript:

BIAS?

Essential Question: SPI How can you determine whether or not a sample is biased?

Biased Sample: A sample that does not fairly represent the population Random: Each member of the population has an equal chance of being selected

Biased OR Not Biased The first 25 students to arrive at school are surveyed to find out how they get to school.

Biased OR Not Biased An employee of a phone company randomly chooses 80 customers to ask whether they are happy with their service.

Biased OR Not Biased McDonald’s surveys 35 costumers off their french fry list asking do they love their fries.

Biased OR Not Biased A famous musician randomly picks 1,000 people in the world to give backstage passes to their concert.

WORK WITH YOUR PARTNER COME UP WITH 1 BIASED SCENARIO COME UP WITH 1 NON-BIASED SCENARIO

LMS was buying new school equipment. Which group would most likely give you a biased answer? A) All faculty and staff B) Baseball coaches only C) Parents of all athletes

A survey was taken about favorite video games. Who should be surveyed. A) Teachers only B) Kindergarten students C) A random group of middle school students

A survey was given about the best school lunch served in the cafeteria. The Cafeteria manager surveyed the LMS employees and made phone calls to parents to determine what the best lunch is. a)Is this sample biased? b)Why or Why not? c)What should be done differently so that it is unbiased?

The governor of Tennessee was trying to come up with a new program for middle schools in the area. He wanted to know what middle school students’ favorite hobby is. He decided to call 600 random families in the Murfreesboro area to conduct a survey to find out. a)Is this sample biased? b)Why or Why not? c)What should be done differently so that it is unbiased?

LMS is buying new equipment for the classrooms and were trying to decide how to spend the money. A survey was given to help make a decision. Which group would most likely give a biased answer? a)Parents of students b)Math teachers c)Teachers from all subject areas d)Random students in the auditorium.

TICKET OUT 1.A company wants to survey teenagers to find out if they have heard of the company’s new clothing brand. Which sample group would most likely to be biased? a)Teens from several different communities b)Teens of a wide range of ages c)Teens from different areas d)Teens who shop at a certain store

2. The NFL was trying to decide who has the best fans. The NFL decided to conduct a survey to determine their answer. Which group should be surveyed so that the sample is not biased? a)Titans cheerleaders b)Only people who live in Texas c)Major league baseball players d)Football fans throughout the country.