# Head movement evaluations are important because disabled

Last updated: 12/8/2023

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 H CL CO 2 3 57 6 35 7 54 5 USE SALT 13 R 084 S 4 5 6 7 56 8 51 1 8 9 70 877 3 51 6 54 7 63 6 59 2 59 2 55 8 38 3 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 10 Find the test statistic Round your answer to two decimal places 11 12 13 14 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 g M State the appropriate null and alternative hypotheses in degrees Enter for as needed Ho MY NOTES Use technology to find the P value Round your answer to four decimal places P value 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 rotation is greater in the clockwise direction than in the counterclockwise direction