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"t described an investigation of the intermolecular forces for UHPC connected to various substrates. The following work of adhesion measurements (in m]/m-) 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.) mJ/m 2 Does the interval suggest that 108 is a plausible value for the true average work of adhesion for UHPC adhered to steel? The interval suggests that 108 is a possible value for the true average. O The interval doesn't suggest that 108 is a possible value for the true average. Does the interval suggest that 111 is a plausible value for the true average work of adhesion for UHPC adhered to steel? O The interval suggests that 111 is a possible value for the true average. O The interval doesn't suggest that 111 is a possible value for the true average. (c) Predict the resulting work of adhesion value resulting from a single future replication of the experiment by calculating a 95% prediction interval. (Round your answers to two decimal places.) mJ/m 2 Compare the width of this interval to the width of the CI from (b). O The two intervals are the same width. The PI is wider than the CI. The CI is wider than the PI. (d) Calculate an interval for which you can have a high degree of confidence that at least 95% of all UHPC specimens adhered to steel will have work of adhesion values between the limits of the interval. (Round your answers to two decimal places.) mJ/m 2