a. What are the null and alternative​ hypotheses? a. What are the null and alternative​ hypotheses? Assume that population 1 consists of the 1988 weights and population 2 consists of the 2012 weights. b. The test​ statistic, t, is  c. The​ P-value is d. State the conclusion for the test. e. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean.

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a. What are the null and alternative​ hypotheses?

a. What are the null and alternative​ hypotheses? Assume that population 1 consists of the 1988 weights and population 2 consists of the 2012 weights.

b. The test​ statistic, t, is 

c. The​ P-value is

d. State the conclusion for the test.

e. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean.

Listed in the accompanying table are weights (kg) of randomly selected U.S. Army male personnel measured in 1988 (from "ANSUR I 1988") and different weights (kg) of randomly selected U.S.
Army male personnel measured in 2012 (from "ANSUR II 2012"). Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not
assume that the population standard deviations are equal. Complete parts (a) and (b).
Click the icon to view the ANSUR data.
a. Use a 0.01 significance level to test the claim that the mean weight of the 1988 population is less than the mean weight of the 2012 population.
What are the null and alternative hypotheses? Assume that population 1 consists of the 1988 weights and population 2 consists of the 2012 weights.
OA. Ho: H₁ H₂
H₁: H₁ H₂
C. Ho: M₁ = ₂
H₁ H₁ H₂
B. Ho: H₁ H₂
H₁ H₁ H₂
D. Ho: ₁ = ₂
H₁ H₁ H₂
Transcribed Image Text:Listed in the accompanying table are weights (kg) of randomly selected U.S. Army male personnel measured in 1988 (from "ANSUR I 1988") and different weights (kg) of randomly selected U.S. Army male personnel measured in 2012 (from "ANSUR II 2012"). Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b). Click the icon to view the ANSUR data. a. Use a 0.01 significance level to test the claim that the mean weight of the 1988 population is less than the mean weight of the 2012 population. What are the null and alternative hypotheses? Assume that population 1 consists of the 1988 weights and population 2 consists of the 2012 weights. OA. Ho: H₁ H₂ H₁: H₁ H₂ C. Ho: M₁ = ₂ H₁ H₁ H₂ B. Ho: H₁ H₂ H₁ H₁ H₂ D. Ho: ₁ = ₂ H₁ H₁ H₂
ANSUR data
ANSUR II 2012
66.2
92.3
88.2
74.4
85.1
69.0
89.8
106.9
95.1
90.0
85.1
116.4
78.2
90.7
54.0
ANSUR I 1988
67.4
79.3
78.4
71.7
79.2
86.3
69.5
71.6
54.0
78.5
77.6
95.7
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Transcribed Image Text:ANSUR data ANSUR II 2012 66.2 92.3 88.2 74.4 85.1 69.0 89.8 106.9 95.1 90.0 85.1 116.4 78.2 90.7 54.0 ANSUR I 1988 67.4 79.3 78.4 71.7 79.2 86.3 69.5 71.6 54.0 78.5 77.6 95.7 Print Done X
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