Stats 250 W16 Final Exam Lecture Review

# Stats 250 W16 Final Exam Lecture Review - Stats 250 Winter...

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Stats 250 Winter 2016: Final Exam Lecture Review Name That Scenario: Bobby and Barney are the owners of a bakery. They are considering packaging their “mini” chocolate chip cookies in individual bags for vending machine sales. Before they embark on this endeavor, they have plans to formulate and decisions to make. Bobby is in charge of production and Barney is in charge of marketing. They need your help. For each issue below, select the most appropriate statistical analysis technique for addressing that issue. _____ 1. Is there a relationship between amount of flour used in the mix (in cups) and cookie moisture content (in %)? A. One-way ANOVA B. Regression C. Chi-squared goodness of fit test D. Chi-squared test of independence E. Chi-squared test of homogeneity _____ 2. Is there an association between type of flour used (all-purpose flour, whole-wheat flour, cake flour) and texture of the cookie (chewy, crisp)? _____ 3. Does the type of flour used (all-purpose flour, whole-wheat flour, cake flour) make a difference to the average cookie moisture content (in %)? 4. Do You Favor Proposition A (or Not)? – A survey of voter sentiment was conducted across four city wards to compare the proportion of voters favoring “Proposition A”. From each of the four city wards, a random sample of 200 voters were polled. Each voter was asked if they support Proposition A (yes or no). The following data was collected. Ward 1 Ward 2 Ward 3 Ward 4 Total Favor A 76 53 59 48 236 Do Not Favor A 124 147 141 152 564 Total 200 200 200 200 800 a. Consider the first cell, that is, the 76 voters from Ward 1 who favor Proposition A. If the proportion of residents

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