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/mz) 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? 0 It's plausible that the distribution could be normal. 0 It's not plausible that the distribution could be normal. (b) Calculate a two-sided 95% condence interval for the true average work of adhesion for UHPC adhered to steel. (Round your answers to two decimal places.) ( , ) mJ/m2 (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/mz Compare the width of this interval to the width of the CI from (b). O The two intervals are the same width. O The PI is wider than the CI. 0 The CI is wider than the PI. (d) Calculate an interval for which you can have a high degree of condence 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/mZ