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To study the effect of curing temperature on shear

Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi ISBN: 9780073401331 38

Solution for problem 1E Chapter 5.4

Statistics for Engineers and Scientists | 4th Edition

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Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi

Statistics for Engineers and Scientists | 4th Edition

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Problem 1E

Problem 1E

To study the effect of curing temperature on shear strength of a certain rubber compound, 80 specimens were cured at 150°C and 95 were cured at 130°C. The specimens cured at 150°C had an average shear strength of 620 psi, with a standard deviation of 20 psi. Those cured at 130°C had an average shear strength of 750 psi, with a standard deviation of 30 psi. Find a 95% confidence interval for the difference between the mean shear strengths of specimens cured at the two temperatures.

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Lecture (Abortion continued) ❖ Following Griswold, the Court held that outlawing abortion violates a woman’s right to privacy ❖ 0­3 months: the government has no compelling interest that outweighs this right ❖ So, States may not interfere with abortion in the first trimester; it’s unconstitutional. ❖ After viability (6­9 months), states may decide that the fetus’s potential outweighs the woman’s right to privacy. ❖ So, states may, if they choose, make abortion illegal after viability except when the woman’s life or health is at stake. ❖ A state could keep abortion legal throughout pregnancy. ❖ Abortion is illegal after viability, in all 50 states. ❖ Gallup poll 1972→should abortion be a woman’s choice ➢ More Republicans said yes than democrats ➢ Catholics said yes ❖ Nixon→when abortion was an issue, pro­life. ❖ After Roe ➢ 1.5 million abortions per year ➢ Now less ➢ 1985 → 80% of abortion clinics had protestors ➢ 1977­2001→7 murders committed, 17 attempted ➢ Today→ 23% of pregnancies in the U.S. end in abortions ❖ Planned Parenthood vs. Casey (1992) ➢ Majority of Supreme COurt was republicans, 5­4 decision ➢ The Court added to Roe→states may protect the fetus’s potential throughout the pregnancy, and so, states may discourage abortion if the laws don’t place an undue burden on the woman. ➢ An undue burden: ■ Parental consent→no ● But there must be a judicial bypass clause (AL) ■ Informed consent laws→no ● Includes 24 hour wait period ■ Spousal notification→yes ● Abusive husbands ❖ The Morality of Abortion ➢ Does the fetus have the right to life ➢ Is being an innocent human being what matters ➢ Possible counter examples: ■ Someone permanently unconscious

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Chapter 5.4, Problem 1E is Solved
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Textbook: Statistics for Engineers and Scientists
Edition: 4
Author: William Navidi
ISBN: 9780073401331

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To study the effect of curing temperature on shear