Being good statisticians you know that in order to

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Being good statisticians, you know that in order to test this claim, you’ll need to collect some data. Your group’s task is to design a completely controlled randomized experiment to collect data to test the effectiveness of eating m&m’s for stress reduction. Your group has the following resources at its disposal: • 200 volunteers (100 male and 100 female of varying ages and backgrounds) • 1 month to conduct the experiment • Enough m&m’s to give all volunteers one bag per day • Enough generic m&m’s (ChocoBites) to give all volunteers one bag per day • A valid clinical stress assessment multiple choice test (stress measuring tool) • Other reasonable resources your group deems necessary Using these resources, or others you feel are necessary, design an experiment to test the claim. Your design should be detailed enough that someone with no statistical knowledge could replicate the experiment. Further, your experiment should take the following into consideration: • Males and females deal with stress differently. • Some people feel chocolate, in general, helps reduce stress • Stress differs from person to person: work, family, school, relationships, etc. Use a sheet of bulletin board paper to present your design. Your presentation should include an experimental question (What are you trying to answer?), a diagram, a written description of your experiment (Who is involved? How will you carry this out?), and a discussion of possible confounding variables. Use the space below to draft your design...consider the following questions: What is your experimental question? What are you trying to answer? What are some possible causes of stress? What are some possible stress- reducers other than m&m’s? What will you measure to determine if stress is being reduced? How will you be able to tell if it is being reduced? What are some possible problems with your experiment? Everything I Ever Wanted to Know about AP Statistics I Learned From a Bag of m&m’s 16
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Random m & m s {Adapted from “Statistics in Action” by Watkins, Scheaffer, Cobb} DO NOT TURN THIS SHEET OVER UNTIL YOU ARE TOLD TO DO SO! Goal : Estimate the average number of m&m’s per pile for the 100 piles pictured on the back. 1) When I give you the signal, you will have 10 seconds to look at the back side of this sheet and make a guess as to the average number of m&m’s per pile. Do not use a pencil or paper...just guess. Guess:__________ Enter this guess on the appropriate dotplot on the board. 2) Select 5 piles that are, in your judgment, representative of the entire population. Calculate the average pile size and enter the result on the dotplot on the board. Representative Average Number:_____________ Enter on the appropriate dotplot. Compare the two distributions... 3) Use a random number table or your calculator to select a SRS of 5 distinct piles.
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