HW #10 - b. z = -2.24 c. H 0 is rejected 30. a. z = -1.918...

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Jeremy Pflug MATH 354 HW #10 Ch. 10 #4, 14, 20, 22, 30, 48, 52 4. a. One-tailed b. Reject if z < -1.88 c. z = -2.67 d. Reject H 0 e. .0038 14. a. Normal population b. Normal assumption is reasonable. c. H 0 : µ ≥ 15 H 1 : µ < 15 X = 13.5 S = 1.504 t = -4.46 Reject H 0 20. H 0 : µ ≤ 53 H 1 : µ > 53 Reject if t > 1.761 t = 3.52 Reject H 0 p-value less than .005 22. a. Reject H 0 if z < -1.96 or z > 1.96
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Unformatted text preview: b. z = -2.24 c. H 0 is rejected 30. a. z = -1.918 b. The test statistic for a mean when is known is z. Transforming the production data to standard units (z values) permits their use not only in the problem but also in other hypothesis-testing problems. c. .0274 48. t = 1.50; do not reject 52. z = 0.841; do not reject...
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