Ultra high performance concrete (UHPC) is a relatively new construction material that is characterized by strong adhesive properties with other materials. The article "Adhesive Power of Ultra High Performance Concrete from a Thermodynamic Point of View"+ described an investigation of the intermolecular forces for UHPC connected to various substrates. The following work of adhesion measurements (in mJ/m2) for UHPC specimens adhered to steel appeared in the article. 107.1 109.5 107.4 106.8 108.1 (a) Is it plausible that the given sample observations were selected from a normal distribution? It's plausible that the distribution could be normal. O It's not plausible that the distribution could be normal. (b) Calculate a two-sided 95% confidence interval for the true average work of adhesion for UHPC adhered to steel. (Round your answers to two decimal places.) 106.44 ✔,156 x ) m³/m² Does the interval suggest that 107 is a plausible value for the true average work of adhesion for UHPC adhered to steel? The interval suggests that 107 is a possible value for the true average. O The interval doesn't suggest that 107 is a possible value for the true average. Does the interval suggest that 112 is a plausible value for the true average work of adhesion for UHPC adhered to steel? O The interval suggests that 112 is a possible value for the true average. The interval doesn't suggest that 112 is a possible value for the true average.
Ultra high performance concrete (UHPC) is a relatively new construction material that is characterized by strong adhesive properties with other materials. The article "Adhesive Power of Ultra High Performance Concrete from a Thermodynamic Point of View"+ described an investigation of the intermolecular forces for UHPC connected to various substrates. The following work of adhesion measurements (in mJ/m2) for UHPC specimens adhered to steel appeared in the article. 107.1 109.5 107.4 106.8 108.1 (a) Is it plausible that the given sample observations were selected from a normal distribution? It's plausible that the distribution could be normal. O It's not plausible that the distribution could be normal. (b) Calculate a two-sided 95% confidence interval for the true average work of adhesion for UHPC adhered to steel. (Round your answers to two decimal places.) 106.44 ✔,156 x ) m³/m² Does the interval suggest that 107 is a plausible value for the true average work of adhesion for UHPC adhered to steel? The interval suggests that 107 is a possible value for the true average. O The interval doesn't suggest that 107 is a possible value for the true average. Does the interval suggest that 112 is a plausible value for the true average work of adhesion for UHPC adhered to steel? O The interval suggests that 112 is a possible value for the true average. The interval doesn't suggest that 112 is a possible value for the true average.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:Ultra high performance concrete (UHPC) is a relatively new construction material characterized by strong adhesive properties with other materials. The article "Adhesive Power of Ultra High Performance Concrete from a Thermodynamic Point of View" described an investigation of the intermolecular forces for UHPC connected to various substrates. The following work of adhesion measurements (in mJ/m²) for UHPC specimens adhered to steel appeared in the article:
107.1, 109.5, 107.4, 106.8, 108.1
(a) Is it plausible that the given sample observations were selected from a normal distribution?
- It's plausible that the distribution could be normal.
- **It's not plausible that the distribution could be normal.** (Selected answer)
(b) Calculate a two-sided 95% confidence interval for the true average work of adhesion for UHPC adhered to steel. (Round your answers to two decimal places.)
- ( **106.44** , 156 ) mJ/m² (106.44 is within the confidence interval)
Does the interval suggest that 107 is a plausible value for the true average work of adhesion for UHPC adhered to steel?
- **The interval suggests that 107 is a possible value for the true average.** (Selected answer)
- The interval doesn't suggest that 107 is a possible value for the true average.
Does the interval suggest that 112 is a plausible value for the true average work of adhesion for UHPC adhered to steel?
- The interval suggests that 112 is a possible value for the true average.
- **The interval doesn't suggest that 112 is a possible value for the true average.** (Selected answer)
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