As a chemist, you added a compound to an oil base hoping to increase its lubricating
qualities. Twenty solutions, 10 with the compound and 10 without, were compared with
respect to their ability to lubricate machinery. Each is graded on a scale of 0 to 10, with 10
being the best. Based on the data on the table, does it appear that
the addition of the compound increases lubrication? Using 𝛼 = 0.05, test the hypothesis that there is no significant difference in the lubricating qualities of the solutions
. What conclusions can be drawn from the decision?
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