Question: Will thumbs up if correct Question 16 Having done poorly on a particular exam in a junior high school, 20 students decide to write the

Will thumbs up if correct Will thumbs up if correct Question 16 Having done poorly on a

Question 16 Having done poorly on a particular exam in a junior high school, 20 students decide to write the exam again to try and improve their mark. Results are given in the following table. Tries remaining 3 Marked out of 3.00 P Flag question Student Attempt 1 (A1) Attempt 2 (A2) Difference (d = A1 - n 20 20 20 Average 52 56 -4.0 Standard deviation 3.0 4.0 2.4 A2) (a) Find a 99% confidence interval for the difference in mean scores between attempt 1 and attempt 2. (Round your answers to 4 decimal places, if needed.) (b) Based on this confidence interval, can we conclude there is a difference in mean scores between attempt 1 and attempt 2? No, since the interval contains o. O No, since the interval is completely below 0. Yes, since the interval contains o. Yes, since the interval is completely below O. Check

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=+c. Suppose that public policy raises the saving rate so that the economy reaches the Golden Rule level of capital. What will the marginal product of capital be at the Golden Rule steady state?

=+a discussion of the CobbDouglas production function, see Chapter 3.)