1. Parts of Dr. Albada's son's bike m stolen a few years ago (unfortunately, this is a true story someone stole his bike seat, handle-bars, surfboard rack, etc.). Let's imagine that she found two different sets of instructions online that can be used to reassemble a bike. She does not know which set of instructions is better for helping her to put together the bike quickly. (I actually took the bike to the bike shop to get it xed, but ignore that for now.) To nd out which set of instructions is better, she decides to conduct a study. She nds eight parents. Half of the parents are given one set of instructions and the other half of the parents are given the second set of instructions. Each parent gets an unassembled bike. She measures how much time is needed for each parent to assemble the bike using the instructions that she gives them. Thus, the scores below in the table are the number of minutes it took to assemble the bike. Answer each part of the question below using this scenario. (6 points total) Instruction Set 1 Instructions Set 2 15 14 22 10 28 12 14 8 M = 19.75 M = 11.00 SD=6.55 SD: 2.58 a. What type of analysis should Dr. Albada conduct to nd out which set of instructions works better, and why? (1 point) b. If you were Dr. Albada, what would your null and alternative hypotheses be? Give the statistical notation for each. Describe in words why you chose the specic alternative hypothesis that you decided I should use. (1 point) c. Calculate Dr. Albada's ttest statistic by hand. Show your work. [2 points) d. Dr. Albada's t-critical value = i 2.45 (a =.05 and df= 6). What decision should Dr. Albada make and why? Describe your answer in the context of the study (i.e., don't just say reject or fail to reject.) (2 points)