Silicone implant augmentation rhinoplasty is used to correct congenital nose def

Question

Silicone implant augmentation rhinoplasty is used to correct congenital nose deformities. The success of the procedure depends on various biomechanical properties of the human nasal periosteum and fascia. An article reported that for a sample of 14 (newly deceased) adults, the mean failure strain (%) was 24.0, and the standard deviation v/as 3.4. (a) Assuming a normal distribution for failure strain, estimate true average strain in a way that conveys information about precision and reliability. (Use a 95% confidence interval. Round your answers to two decimal places.) (% %) (b) Predict the strain for a single adult in a way that conveys information about precision and reliability. (Use a 95% prediction interval. Round your answers to two decimal places.) (% %) How does the prediction compare to the estimate calculated in part (a)? The prediction interval is much narrower than the confidence interval in part (a). The prediction interval is the same as the confidence interval in part (a). The prediction interval is much wider than the confidence interval in part (a). You may need to use the appropriate table in the Appendix of Tables to answer this question.

Explanation / Answer

95 % Confidence Interval:

n=14

±1.78
Range for true average strain

22.22 to 25.78

=====================

95 % Confidence Interval:

n=1

±6.66
Range for the true average strain

17.34 to 30.66

Answer should be (c)

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