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Noise and Stress To compare the effect ofstress in the
Chapter 8, Problem 52(choose chapter or problem)
Noise and Stress To compare the effect ofstress in the form of noise on the ability to performa simple task, 70 subjects were divided into twogroups. The first group of 30 subjects acted as a control,while the second group of 40 were the experimentalgroup. Although each subject performed thetask, the experimental group subjects had to performthe task while loud rock music was played. The timeto finish the task was recorded for each subject and thefollowing summary was obtained:Control Experimentaln 30 40x 15 minutes 23 minutess 4 minutes 10 minutesa. Find a 99% confidence interval for the difference inmean completion times for these two groups.b. Based on the confidence interval in part a, is theresufficient evidence to indicate a difference in theaverage time to completion for the two groups?Explain.
Questions & Answers
QUESTION:
Noise and Stress To compare the effect ofstress in the form of noise on the ability to performa simple task, 70 subjects were divided into twogroups. The first group of 30 subjects acted as a control,while the second group of 40 were the experimentalgroup. Although each subject performed thetask, the experimental group subjects had to performthe task while loud rock music was played. The timeto finish the task was recorded for each subject and thefollowing summary was obtained:Control Experimentaln 30 40x 15 minutes 23 minutess 4 minutes 10 minutesa. Find a 99% confidence interval for the difference inmean completion times for these two groups.b. Based on the confidence interval in part a, is theresufficient evidence to indicate a difference in theaverage time to completion for the two groups?Explain.
ANSWER:Step 1 of 4
We are given the following data
For the experimental group
Number of samples:
Sample mean:
Standard deviation:
For the control group
Number of samples:
Sample mean:
Standard deviation:
