A coach uses a new technique in training middle distance runners. The times ( seconds ) for 9 different athletes to run 800 meters before and after this training are shown below. Construct a 97% confidence interval for the mean difference of the athletes times.  ("before" minus "after") .   Before 94 100 85 86 112 91 113 106 100 After 82 83 87 78 88 81 90 88 97   What is the sample mean  of the differences?   c007.p071.q008    数值题

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For stock A, we have 𝛽 𝑖 = 0.70. Suppose the expected market risk premium next year is 9% and the risk-free rate is 3%. What is the expected return of this stock based on the CAPM? (Please answer in % and round to 2 decimal places. If the answer is 8.057%, then in the box, write 8.06)

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