A study of the effect of exposure to color ( red or blue) on the ability to solve puzzles used 44 subjects. Half the subjects were asked to solve a series of puzzles while in a red-colored environment. The other half were asked to solve the same series of puzzles while in a blue-colored environment. The 22 subjects in the red-colored environment had a mean time for solving the puzzles of 9.61 seconds with standard deviation 3.39 ; the 22 subjects in the blue-colored environment had a mean time of 15.84 seconds with standard deviation 8.65 . The two-sample t statistic for comparing the population means has value _____ (± 0.001).

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Sol Given that the X 961 7 1584 n ... View the full answer