Answer to Question #215307 in Statistics and Probability for charm

Question #215307

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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