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/

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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/ HW Vocabulary: Population sample simple random sample systematic sample self-selected sample convenience sample stratified sample bias Survey observational study experiment.. Classify and analyze samples. Classify and analyze studies.

12-1 Samples and Studies Slope

Notes and examples A. MOVIES Every fifth person walking out of a movie theater is asked to name their favorite type of movie. Identify the sample, and suggest a population from which it is selected. B. MOVIES Every fifth person walking out of a movie theater is asked to name their favorite type of movie. Classify the sample as simple, systematic, self- selected, convenience, or stratified. Explain your reasoning.

Notes and examples WEBSITES Visitors to a Web site are asked to complete a questionnaire about their favorites aspects of the site and what could be done to improve it. Identify the sample, and suggest a population from which it is selected. Classify the sample as simple, systematic, self-selected, convenience, or stratified. Explain your reasoning. A. STUDENT COUNCIL The student council surveys the students in one classroom to decide the theme for the spring dance. Identify the sample as biased or unbiased. Explain your reasoning

Notes and examples B. SCHOOL The Parent Association surveys the parents of every fifth student on the school roster to decide whether to hold a fundraiser. Identify the sample as biased or unbiased. Explain your reasoning. ELECTRONICS An electronics company uses a randomly selected group its employees’ children to test a new product. Identify the sample as biased or unbiased. Explain your reasoning.

Notes and examples

A. RETAIL A retailer wants to evaluate their performance in customer service. They contact 1000 random customers asking if they would complete an evaluation form. Determine whether this situation describes a survey, an observational study, or an experiment. Explain your reasoning. B. VITAMINS Researchers analyze the reactions of rats to a vitamin. Determine whether this situation describes a survey, an observational study, or an experiment. Explain your reasoning.

Notes and examples TELEVISION Researchers analyze the reactions of people to a new type of television screen. Is this a survey, an observational study, or an experiment? Explain your reasoning. A. Identify each survey question as biased or unbiased. If biased, explain your reasoning. How often do you exercise?

Notes and examples Identify each survey question as biased or unbiased. If biased, explain your reasoning. Do you like basketball? If so, do you prefer watching high school, college, or professional? Identify the survey question as biased or unbiased. If biased, explain your reasoning. Should the school district offer college courses to qualified high school students for free?

Notes and examples BASEBALL A baseball bat manufacturer wants to test a new grip on their bats. They select 75 high school baseball players to try out the bat with the new grips and 75 other players to try out the old grips. Identify the experiment as biased or unbiased. If biased, explain your reasoning. DRUGS A research team wants to test a new anti-balding drug. They select 50 randomly chosen men to try the drug and give 50 other randomly chosen balding men a placebo. Identify the experiment as biased or unbiased.