Research has shown that losing even one night's sleep can have a significant effect on performance of complex tasks, such as problem solving (Linde& Bergstroem,1992). To demonstrate this phenomenon, a sample of n : 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep inbetween the two tests. For each student, the difference between the first and second score was recorded. For this sample, the students averaged M, : 4.7 points better on the first test with a variance of s2 : 64 for the difference scores. a. Do the data indicate a signficant change in problem-solving ability? Use a two-tained test with a: .05"
Research has shown that losing even one night's sleep can have a significant effect on performance of complex tasks, such as problem solving (Linde& Bergstroem,1992). To demonstrate this phenomenon, a sample of n : 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep inbetween the two tests. For each student, the difference between the first and second score was recorded. For this sample, the students averaged M, : 4.7 points better on the first test with a variance of s2 : 64 for the difference scores.
a. Do the data indicate a signficant change in problem-solving ability? Use a two-tained test with a: .05"
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