Question
Four different paints are advertised as having the same drying time. To check the manufacturer's claims, five samples were tested for each of the paints.
Four different paints are advertised as having the same drying time. To check the manufacturer's claims, five samples were tested for each of the paints. The time in minutes until the paint was dry enough for a second coat to be applied was recorded. The following data were obtained.
Excel users: The data set is available in file named Paint. All data sets can be found on the premium online datasite. Click on the datafile logo to reference the data.
Paint 1 | Paint 2 | Paint 3 | Paint 4 | |
128 | 144 | 133 | 150 | |
137 | 133 | 143 | 142 | |
135 | 142 | 137 | 135 | |
124 | 146 | 136 | 140 | |
141 | 130 | 131 | 153 | |
At the A=0.05 level of significance, test to see whether the mean drying time is the same for each type of paint.
Compute the values identified below (to 2 decimals, if necessary).
Sum of Squares, Treatment | |
Sum of Squares, Error | |
Mean Squares, Treatment | |
Mean Squares, Error |
Calculate the value of the test statistic (to 2 decimals). _____
The P-value is _________
What is your conclusion? ____
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