Question: 13.R.084.S. MY NOTES Head movement evaluations are important because disabled individuals may be able to operate communication aids using head motion. A paper reported
13.R.084.S. MY NOTES Head movement evaluations are important because disabled individuals may be able to operate communication aids using head motion. A paper reported the accompanying data on neck rotation (in degrees) both in the clockwise direction (CL) and in the counterclockwise direction (CO) for 14 subjects. For purposes of this exercise, you can assume that the 14 subjects are representative of the population of adult Americans. Subject: 1 2 3 4 56 7 8 9 10 11 12 13 14 CL: 57.6 35.7 54.5 56.8 51.1 70.8 77.3 51.6 54.7 63.6 59.2 59.2 55.8 38.3 CO: 44.6 52.1 60.2 52.7 47.2 65.6 71.4 48.8 53.1 66.3 59.8 47.5 64.5 34.4 USE SALT Based on these data, is it reasonable to conclude that mean neck rotation is greater in the clockwise direction than in the counterclockwise direction? Carry out a hypothesis test using a significance level of a = 0.01. (Use for clockwise, for counterclockwise, and = - H.) State the appropriate null and alternative hypotheses (in degrees). (Enter != for as needed.) Ho Find the test statistic. (Round your answer to two decimal places.) Use technology to find the P-value. (Round your answer to four decimal places.) P-value= 4 State the conclusion in the problem context. We fail to reject Ho. It is not reasonable to conclude that mean neck rotation is greater in the clockwise direction than in the counterclockwise direction. We fall to reject Ho. It is reasonable to conclude that mean neck rotation is greater in the clockwise direction than in the counterclockwise direction. We reject Ho. It is not reasonable to conclude that mean neck rotation is greater in the clockwise direction than in the counterclockwise direction. de rotation is greater in the clockwise direction than in the counterclockwise direction.
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