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Question 1 An Engineer wishes to determine whether there is any difference in tensile strength of a newly developed material before and after the aging process. Table 1 below recorded the data (in psi). Specimen Before After No. Aged Aged 1 218 203 2 229 216 3 229 217 222 211 5 225 215 6 234 218 237 224 a) Is there evidence to support the claim that the newly developed material tensile strength is the same before and after the aging process? Use the P-value approach. (7 Marks) b) Find a 90% Cl on the mean difference in tensile strength and use it to answer the question from part (a)