Week 4 Project - STAT 3001

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1 Week 4 Project - STAT 3001 Student Name: < Angela Johnson > Date: < March 25, 2015 .> Instructions: To complete this project, you will need the following materials:  STATDISK User Manual (found in the classroom in DocSharing)  Access to the Internet to download the STATDISK program. Part I. Analyze Data Instructions Answers 1. Open the file COTININE using menu option Datasets and then Elementary Stats, 9 th Edition . This file con tains some information about a exposure to second - hand smoke . How many observations are there in this file ? There are 3 columns of data each containing 40 observations so in total there are 120 observations. In this file, there are three variables, labeled Smokers, ETS, and No ETS. The dataset was collected for a study of second - hand smoke. The sample data consists of the measured serum cotinine levels in three different groups of people.  The NOETS group lists the cotinine levels for subjects who are nonsmokers and have no exposure to environmental tobacco smoke at home or work.  The ETS group lists cotinine levels for subjects who are nonsmokers exposed to tobacco smoke at home or work.  The SMOKERS group lists cotinine levels for subjects who report tobacco use. Serum cotinine is a metabolite of nicotine, meaning that cotinine is produced when nicotine is absorbed by the body. Higher levels of cotinine correspond to higher levels of exposure to smoke that contains nicotine. 2. What results do you expect to find in this data? We would expect the smoker group to have the highest levels of cotinine levels followed by ETS and NOETS group Part II. Descriptive Statistics 3 - 6 Generate descriptive statistics for all three groups of people and complete the Variable Sample Mean Sample Standard Deviation Sample Size Smokers 172.48 119.50 40
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