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Nondestructive evaluation. Nondestructive evaluation (NDE) describes methods that quantitatively characterize materials, tissues, and structures by noninvasive means, such as X-ray computed tomography, ultrasonics, and acoustic emission. Recently, NDE was used to detect defects in steel castings (JOM, May 2005). Assume that the
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- Patients with rheumatoid arthritis are at a greater risk of developing osteoporosis. The reasons are not well understood due to the difficulty in qualitatively assessing bone metabolism and mineral content. A researcher measures human calcitonin (HCT) levels in men with rheumatoidarthritis. The researcher randomly selects 43 men with rheumatoid arthritis and measured the mean HCT level of 33.8 pg/mL. Assume that HCT for individuals with rheumatoid arthritis follows a normal distribution with standard deviation σ = 23.6 pg/mL. 3. Create a 95% confidence interval for the population mean HCT.arrow_forwardHeat flow is the passage of thermal energy from a hot to a cold body. This phenomenon is of particular interest to engineers, who attempt to understand and control the flow of heat through the use of thermal insulation and other devices. The data below were taken from heat flow gauge readings for an industrial process over 10 equally spaced time intervals. A concern is that the process may be cooling down as time progresses. One way to check this statistically is to compare the measurements for the first 5 time periods to the measurements for the last 5 time periods. You may assume that heat flow is approximately normal for each group. Time period 1 (Group 1): 9.273, 9.262, 9.243, 9.283, 9.270Time period 2 (Group 2): 9.240, 9.292, 9.284, 9.279, 9.258 Unless otherwise stated, give your answers to three decimal places. Construct a 95% confidence interval for the difference in mean heat flow. Give your answers to three decimal places. Use t∗=2.352t∗=2.352.( , ) Conduct a hypothesis…arrow_forwardMultiple myeloma, or blood plasma cancer, is characterized by increased blood vessel formulation (angiogenesis) in the bone marrow that is a predictive factor in survival. One treatment approach used for multiple myeloma is stem cell transplantation with the patient's own stem cells. The data show below represents the bone marrow microvessel density for patients who has a complete response to the stem cell transplant (as measured by blood and urine tests). The measurements were taken immediately prior to the stem cell transplant and at the time the complete response was determined. Patient Before After 1 158 284 2 186 214 3 202 101 4 353 227 5 416 290 6 426 176 7 441…arrow_forward
- 5.2arrow_forwardCompute a 95% CI for the mean white blood countfollowing admission.arrow_forwardElasticity is an important parameter of kernmantle ropes (used in climbing, caving, mountaineering, etc.). One of the ways of describing it is static elongation (measured under a resting load of 80 kg). Static elongation was measured for two random rope samples of two different types of weaving. type-1 6.34 6.16 6.32 6.21 6.36 6.43 6.02 6.21 6.47 6.21 6.49 6.21 6.16 6.19 6.29 6.33 6.51 type-2 6.38 6.51 6.49 6.44 6.46 6.43 6.52 6.32 6.33 6.32 6.31 6.34 6.13 6.42 (b) Find the P-value for this test. O 0.01 < P - value < 0.025 0.1 < P - value < 0.25 0.05 < P – value < 0.1 0.0025 < P – value < 0.005 (c) Construct a 95% confidence interval for the difference in the mean static elongation of ropes. Round your answers to three decimal places (e.g. 98.765).arrow_forwardNot sure how to do thisarrow_forwardCompute a 95% CI for the mean age.arrow_forwardFoot ulcers are a common problem for people with diabetes. Higher skin temperatures on the foot indicate an increased risk of ulcers. The article "An Intelligent Insole for Diabetic Patients with the Loss of Protective Sensation" (Kimberly Anderson, M.S. Thesis, Colorado School of Mines), reports measurements of temperatures, in °F, of both feet for 181 diabetic patients. The results are presented in the following table. Left Foot Right Foot 80 80 85 85 75 80 88 86 89 87 87 82 78 78 88 89 89 90 76 81 89 86 87 82 78 78 80 81 87 82 86 85 76 80 88 89 Construct a scatterplot of the right foot temperature (y) versus the left foot temperature (x). Verify that a linear model is appropriate. b. Compute the least-squares line for predicting the right foot temperature from the left foot temperature. If the left foot temperatures of two patients differ by 2 degrees, by how much would you predict their right foot temperatures to differ? Predict the right foot temperature for a patient whose left…arrow_forwardif able please provide some explanation with the taken steps in the exercise attached image. Thank you in advancearrow_forwardWarming and Ice Melt The average depth of the Hudson Bay is 305 feet. Climatologists were interested in seeing if the effects of warming and ice melt were affecting the water level. Fifty-five measurements over a period of weeks yielded a sample mean of 306.2 feet. The population variance is known to be 3.6. Can it be concluded that the average depth has increased with a=.05 ? a)Use the P-value Method b) Use the Critical Value Methodarrow_forwardPlease circle your answers. Thank you in advanced!arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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