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When a Surgeon Repairs Injuries, Sutures (Stitched Knots) Are Sometimes

Question 2

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When a surgeon repairs injuries, sutures (stitched knots) are sometimes used to hold together and stabilize the injured area. If these knots elongate and loosen, the injury may not heal properly. Researchers at the University of California, San Francisco, tied a particular type of knot with two types of suture material, Maxon and Ticron. Suppose that 112 tissue specimens were available and that for each specimen the type of suture material was randomly assigned. The investigators tested the knots to see how much they elongated. For purposes of this exercise, you can assume that it is reasonable to regard the elongation distributions as approximately normal. Which of the following hypotheses should be tested to determine if there is a significant difference in mean elongation between Maxon versus Ticron threads? ​


A) When a surgeon repairs injuries, sutures (stitched knots) are sometimes used to hold together and stabilize the injured area. If these knots elongate and loosen, the injury may not heal properly. Researchers at the University of California, San Francisco, tied a particular type of knot with two types of suture material, Maxon and Ticron. Suppose that 112 tissue specimens were available and that for each specimen the type of suture material was randomly assigned. The investigators tested the knots to see how much they elongated. For purposes of this exercise, you can assume that it is reasonable to regard the elongation distributions as approximately normal. Which of the following hypotheses should be tested to determine if there is a significant difference in mean elongation between Maxon versus Ticron threads? ​ A) B) C) D) E)
B) When a surgeon repairs injuries, sutures (stitched knots) are sometimes used to hold together and stabilize the injured area. If these knots elongate and loosen, the injury may not heal properly. Researchers at the University of California, San Francisco, tied a particular type of knot with two types of suture material, Maxon and Ticron. Suppose that 112 tissue specimens were available and that for each specimen the type of suture material was randomly assigned. The investigators tested the knots to see how much they elongated. For purposes of this exercise, you can assume that it is reasonable to regard the elongation distributions as approximately normal. Which of the following hypotheses should be tested to determine if there is a significant difference in mean elongation between Maxon versus Ticron threads? ​ A) B) C) D) E)
C) When a surgeon repairs injuries, sutures (stitched knots) are sometimes used to hold together and stabilize the injured area. If these knots elongate and loosen, the injury may not heal properly. Researchers at the University of California, San Francisco, tied a particular type of knot with two types of suture material, Maxon and Ticron. Suppose that 112 tissue specimens were available and that for each specimen the type of suture material was randomly assigned. The investigators tested the knots to see how much they elongated. For purposes of this exercise, you can assume that it is reasonable to regard the elongation distributions as approximately normal. Which of the following hypotheses should be tested to determine if there is a significant difference in mean elongation between Maxon versus Ticron threads? ​ A) B) C) D) E)
D) When a surgeon repairs injuries, sutures (stitched knots) are sometimes used to hold together and stabilize the injured area. If these knots elongate and loosen, the injury may not heal properly. Researchers at the University of California, San Francisco, tied a particular type of knot with two types of suture material, Maxon and Ticron. Suppose that 112 tissue specimens were available and that for each specimen the type of suture material was randomly assigned. The investigators tested the knots to see how much they elongated. For purposes of this exercise, you can assume that it is reasonable to regard the elongation distributions as approximately normal. Which of the following hypotheses should be tested to determine if there is a significant difference in mean elongation between Maxon versus Ticron threads? ​ A) B) C) D) E)
E) When a surgeon repairs injuries, sutures (stitched knots) are sometimes used to hold together and stabilize the injured area. If these knots elongate and loosen, the injury may not heal properly. Researchers at the University of California, San Francisco, tied a particular type of knot with two types of suture material, Maxon and Ticron. Suppose that 112 tissue specimens were available and that for each specimen the type of suture material was randomly assigned. The investigators tested the knots to see how much they elongated. For purposes of this exercise, you can assume that it is reasonable to regard the elongation distributions as approximately normal. Which of the following hypotheses should be tested to determine if there is a significant difference in mean elongation between Maxon versus Ticron threads? ​ A) B) C) D) E)

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