A study of the effect of exposure to color (red or blue) on the ability to solve puzzles used 42 subjects. Half the subjects (21) 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 time taken to solve the puzzles was recorded for each subject. To compare the mean times for the two groups of subjects using statistical procedures, what is the degrees of freedom? d.f.? 2.A study of commuting times reports the travel times to work of a random sample of 1066 employed adults in Chicago. The mean is x = 53.0 minutes and the standard deviation is s = 47.9 minutes. What is the standard error of the mean? (Round your answer to four decimal places.) ? minutes
1A study of the effect of exposure to color (red or blue) on the ability to solve puzzles used 42 subjects. Half the subjects (21) 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 time taken to solve the puzzles was recorded for each subject. To compare the mean times for the two groups of subjects using statistical procedures, what is the degrees of freedom?
d.f.?
2.A study of commuting times reports the travel times to work of a random sample of 1066 employed adults in Chicago. The mean is x = 53.0 minutes and the standard deviation is s = 47.9 minutes. What is the standard error of the mean? (Round your answer to four decimal places.)
? minutes
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