An experiment is being conducted to compare the tension bond strength of polymer latex modified mortar to that of unmodified mortar. Let μ1 and μ2 be the true mean tension bond strengths for the modified and unmodified mortars respectively. The question of interest is whether the mean bond strength of modified mortars i
An experiment is being conducted to compare the tension bond strength of polymer latex modified mortar to that of unmodified mortar. Let μ1 and μ2 be the true mean tension bond strengths for the modified and unmodified mortars respectively. The question of interest is whether the mean bond strength of modified mortars is larger than that of the unmodified mortars. Assume that the bond strength distributions are both normal. Assume that σ1 = 1.6 and σ2 = 1.4. Suppose the investigator decided to use a level 0.05 test and wished β = 0.10 to detect a difference of one unit between the two true means. If she decides to take a sample of size 35 of the modified mortars, what
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