Question

5. Four different paints are advertised to have the same drying times. To verify the manufacturer's claim, seven samples were tested for each of the paints. The time in minutes untl the paint was dry enough for a second coat to be applied was recorded. Below are the results which may be imported into MSExcel for anatysls: (Assume the populations are normally distributed, the populations are independent and the population varlances are equal) Paint 1 Paint 2 Paint 3 Paint 4 120 128 117 130 112 131 122 121 121 131 123 126 118 129115 123 120 126 118 17123 114 121 126 126 117 118 137 126 Wnite the Null and Alternative hypothesis to test whether there is a difference in dry ime between the samples of each paint? a. b. What statistic would you use to analyze this? c. At a 0.05 level of significance, what would be your decision rule? d. From your analysis, is there a dfference between drying times? e If there was a difterence in dry times how would you determine which paint has the different drying time? 0.e. what formula would you use and what is your decision criteria?) (this is not asking for a caiculation)

Answer 1

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