Question: In an experiment designed to study the effects of illumination level on task performance, subjects were required to insert a fine-tipped probe into the eyeholes of ten needles in rapid succession both for light level with a black background and a higher level with a white background. Each data value is the time results (in seconds) to complete the task as shown here:

Does the data indicate that the higher level of illumination yields a decrease of more than 5 seconds in the difference between task completion time? (Note, the data is also provided on worksheet P4. 10 pts)

1. What is the most appropriate hypothesis test technique for this study?
2. Conduct a test to see if there is if the higher level of illumination yields a decrease of more than 5 seconds at alpha = .05 level. Consider this statement to be the claim. Conduct the test while placing the claim on the Alternate Hypothesis.

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