STAT200 Final: Final Exam Summer 2015
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Show all of your work on the exam paper. [8: a local county is considering a budget proposal that would allocate extra funding toward the renovation of city parks. A survey is conducted to measure public opinion concerning the proposal. 150 individuals respond to the survey: 50 who live within the city limits and 100 from the surrounding suburbs. [12: the cutting speeds of four tools were compared in an experiment. Five materials of varying degrees of hardness were used as experimental blocks. The anova table of this experiment is given in the following table: F: find the missing values in the table, do the data provide su cient evidence to indicate a di erence in the cutting speeds of 4 types of tools. Test using = 0. 01: find 90% con dence interval to estimate the di erence in hardness of material 1 and material 3. [6: two geological formations are compared with respect to richness of mineral content.
