Persons having Raynaud's syndrome are apt to suffer a sudden impairment of blood circulation in fingers and toes. In an experiment to study the extent of this impairment, each subject immersed a forefinger in water and the resulting heat output (cal/cm2/min) was measured. For m = 8 subjects with the syndrome, the average heat output was x = 0.63, and for n = 8 nonsufferers, the average output was 2.08. Let ₁ and ₂ denote the true average heat outputs for the sufferers and nonsufferers, respectively. Assume that the two distributions heat output are normal with ₁0.1 and ₂-0.5. (a) Consider testing Ho: #₁ #₂ -1.0 versus Ha: #₁ #₂ < -1.0 at level 0.01. Describe in words what H says, and then carry out the test. H says that the average heat output for sufferers is less than 1 cal/cm2/min below that of non-sufferers. H says that the average heat output for sufferers is the same as that of non-sufferers. H says that the average heat output for sufferers is more than 1 cal/cm2/min below that of non-sufferers. Calculate the test statistic and P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value= State the conclusion in the problem context. Fail to reject Ho. The data suggests that the average heat output for sufferers is less than 1 cal/cm2/min below that of non-sufferers. Fail to reject Ho. The data suggests that the average heat output for sufferers is the same as that of non-sufferers. Reject Ho. The data suggests that the average heat output for sufferers is more than 1 cal/cm²/min below that of non-sufferers. Reject Ho. The data suggests that the average heat output for sufferers is the same as that of non-sufferers. (b) What the probability of a type II error when the actual difference between ₁ and ₂ is #₁ #₂ = -1.2? (Round your answer to four decimal places.) (c) Assuming that m= n, what sample sizes are required to ensure that = 0.1 when #₁ #₂ = -1.2? (Round your answer up to the nearest whole number.) subjects

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter8: Further Techniques And Applications Of Integration
Section8.EA: Extended Application Flow Systems
Problem 2EA
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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 experiment to study the extent of this impairment, each subject immersed a forefinger in water and the resulting heat output (cal/cm²/min) was
measured. For m = 8 subjects with the syndrome, the average heat output was x = 0.63, and for n = 8 nonsufferers, the average output was 2.08. Let μ₁ and μ₂ denote the true average heat outputs for the sufferers and nonsufferers, respectively. Assume that the
two distributions of heat output are normal with = 0.1 and
⁰1
= 0.5.
%2
-
(a) Consider testing Ho: M₁ M₂ = -1.0 versus Ha: M₁ M₂ < -1.0 at level 0.01. Describe in words what H₂ says, and then carry out the test.
OH₂ says that the average heat output for sufferers is less than 1 cal/cm2/min below that of non-sufferers.
Ha says that the average heat output for sufferers is the same as that of non-sufferers.
OH says that the average heat output for sufferers is more than 1 cal/cm2/min below that of non-sufferers.
Calculate the test statistic and P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.)
Z =
P-value =
State the conclusion in the problem context.
Fail to reject Ho. The data suggests that the average heat output for sufferers is less than 1 cal/cm²/min below that of non-sufferers.
Fail to reject Ho. The data suggests that the average heat output for sufferers is the same as that of non-sufferers.
Reject Ho. The data suggests that the average heat output for sufferers is more than 1 cal/cm²/min below that of non-sufferers.
Reject Ho. The data suggests that the average heat output for sufferers is the same as that of non-sufferers.
(b) What is the probability of a type II error when the actual difference between
and
μ1
2
is μ₁ −μ₂
= -1.2? (Round your answer to four decimal places.)
(c) Assuming that m = n, what sample sizes are required to ensure that p = 0.1 when μ₁ −μ₂ = -1.2? (Round your answer up to the nearest whole number.)
subjects
Transcribed Image Text:Persons having Raynaud's syndrome are apt to suffer a sudden impairment of blood circulation in fingers and toes. In an experiment to study the extent of this impairment, each subject immersed a forefinger in water and the resulting heat output (cal/cm²/min) was measured. For m = 8 subjects with the syndrome, the average heat output was x = 0.63, and for n = 8 nonsufferers, the average output was 2.08. Let μ₁ and μ₂ denote the true average heat outputs for the sufferers and nonsufferers, respectively. Assume that the two distributions of heat output are normal with = 0.1 and ⁰1 = 0.5. %2 - (a) Consider testing Ho: M₁ M₂ = -1.0 versus Ha: M₁ M₂ < -1.0 at level 0.01. Describe in words what H₂ says, and then carry out the test. OH₂ says that the average heat output for sufferers is less than 1 cal/cm2/min below that of non-sufferers. Ha says that the average heat output for sufferers is the same as that of non-sufferers. OH says that the average heat output for sufferers is more than 1 cal/cm2/min below that of non-sufferers. Calculate the test statistic and P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) Z = P-value = State the conclusion in the problem context. Fail to reject Ho. The data suggests that the average heat output for sufferers is less than 1 cal/cm²/min below that of non-sufferers. Fail to reject Ho. The data suggests that the average heat output for sufferers is the same as that of non-sufferers. Reject Ho. The data suggests that the average heat output for sufferers is more than 1 cal/cm²/min below that of non-sufferers. Reject Ho. The data suggests that the average heat output for sufferers is the same as that of non-sufferers. (b) What is the probability of a type II error when the actual difference between and μ1 2 is μ₁ −μ₂ = -1.2? (Round your answer to four decimal places.) (c) Assuming that m = n, what sample sizes are required to ensure that p = 0.1 when μ₁ −μ₂ = -1.2? (Round your answer up to the nearest whole number.) subjects
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