Persons having Raynaud's syndrome are apt to suffer a sudden impairment of blood circulation in fingers and toes. In an

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answerhappygod
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Persons having Raynaud's syndrome are apt to suffer a sudden impairment of blood circulation in fingers and toes. In an

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Persons having Raynaud's syndrome are apt to suffer a suddenimpairment of blood circulation in fingers and toes. In anexperiment to study the extent of this impairment, each subjectimmersed a forefinger in water and the resulting heat output(cal/cm2/min) was measured. For m = 9 subjects with the syndrome,the average heat output was x = 0.61, and for n = 9 nonsufferers,the average output was 2.01. Let πœ‡1 and πœ‡2 denote the true averageheat outputs for the sufferers and nonsufferers, respectively.Assume that the two distributions of heat output are normal with 𝜎1= 0.1 and 𝜎2 = 0.5. (a) Consider testing H0: πœ‡1 βˆ’ πœ‡2 = βˆ’1.0 versusHa: πœ‡1 βˆ’ πœ‡2 < βˆ’1.0 at level 0.01. Describe in words what Hasays, and then carry out the test. Ha says that the average heatoutput for sufferers is more than 1 cal/cm2/min below that ofnon-sufferers. Ha says that the average heat output for sufferersis less than 1 cal/cm2/min below that of non-sufferers. Ha saysthat the average heat output for sufferers is the same as that ofnon-sufferers. Correct: Your answer is correct. Calculate the teststatistic and P-value. (Round your test statistic to two decimalplaces and your P-value to four decimal places.) z = -2.91Incorrect: Your answer is incorrect. P-value = 0.0010 Incorrect:Your answer is incorrect. State the conclusion in the problemcontext. Fail to reject H0. The data suggests that the average heatoutput for sufferers is less than 1 cal/cm2/min below that ofnon-sufferers. Reject H0. The data suggests that the average heatoutput for sufferers is more than 1 cal/cm2/min below that ofnon-sufferers. Fail to reject H0. The data suggests that theaverage heat output for sufferers is the same as that ofnon-sufferers. Reject H0. The data suggests that the average heatoutput for sufferers is the same as that of non-sufferers. Correct:Your answer is correct. (b) What is the probability of a type IIerror when the actual difference between πœ‡1 and πœ‡2 is πœ‡1 βˆ’ πœ‡2 =βˆ’1.3? (Round your answer to four decimal places.) (c) Assuming thatm = n, what sample sizes are required to ensure that 𝛽 = 0.1 whenπœ‡1 βˆ’ πœ‡2 = βˆ’1.3? (Round your answer up to the nearest whole number.)subjects
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