Head movement evaluations are important because disabled individuals may be able to operate communications aids using head motion. A paper reported the accompanying data on neck rotation (in degrees) for 14 subjects both in the clockwise direction (CL) and in the counterclockwise direction (CO). For purposes of this exercise, you can assume that the 14 subjects are representative of the population of adult Americans.Subject:1234567891011121314CL:57.235.754.556.851.170.877.351.654.763.659.259.255.838.2CO:44.552.160.252.747.265.671.448.853.166.359.847.564.534.4 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 0.01. (Use ?CL − ?CO.)Find the test statistic. (Round your answer to two decimal places.)t = Find the df.df = Use technology to find the P-value. (Round your answer to four decimal places.)P-value =

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Answered: Find the test statistic.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Head movement evaluations are important because disabled individuals may be able to operate communications aids using head motion. A paper reported the accompanying data on neck rotation (in degrees) for 14 subjects both in the clockwise direction (CL) and in the counterclockwise direction (CO). 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	5	6	7	8	9	10	11	12	13	14
CL:	57.2	35.7	54.5	56.8	51.1	70.8	77.3	51.6	54.7	63.6	59.2	59.2	55.8	38.2
CO:	44.5	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

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 0.01. (Use ?_CL − ?_CO.)

Find the test statistic. (Round your answer to two decimal places.)

t =

Find the df.

df =

Use technology to find the P-value. (Round your answer to four decimal places.)

P-value =

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