2 a) Using the Space Mountain data from Section 3-3 #9 (pg. 141), calculate the mean and the median. Show your calculations and include units in your response. Based on these two measures, how would you describe the distribution of the data? b) Calculate the variance and standard deviation by completing a table like the one provided below. Use four decimal places throughout your calculations, and include units in your response. What does (x x) approximately equal? Explain. x (x x) (x x) 2 . . . . . . . . . Total: s 2 = s = c) Calculate a z-score for the observations 58, 29, 4. Show your work. Based on the z-score values, which of these would be considered "unusual" values, and why? d) If you had to pick two values from the data set such that the variability was minimized, which two values would you pick?