Assignment 7 Solutions

Assignment 7 Solutions - CE93 - Engineering Data Analysis...

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CE93 - Engineering Data Analysis Joan Walker, Spring 2011 Solution to Assignment 7 1. (20 points) Number of observations n = 20. a) The a-axis of CFD is value of F(t). F(t) = M(t)/n and M(t) is the number of observations with value less than or equal to t. We have even number. Rearrange the observation values from the lowest to the highest. In the middle (11 th and 12 th ), we have two values. Since both are 2, the median of t is 2. b) mean(t)=2.5, variance(t)= 0.8947 c) The plot indicates there may be a positive linear relationship between t and a. d) cov(t,a)=0.96. This shows there is a high positive linear relationship between t and a. This is consistent with what we see in the plot of part c. -0.2 0 0.2 0.4 0.6 0.8 1 1.2 0 1 2 3 4 5 F(t) CFD for t 0 2 4 6 8 10 0 1 2 3 4 5 y x
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CE93 - Engineering Data Analysis Joan Walker, Spring 2011 2. (20 points) a) f x, y ± dxdy = 1 ² ² a x + y ± dxdy = 1 1 0 1 0 So a= 1. b) The question is only asking for marginal probability related to X. First, we should get
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This note was uploaded on 06/02/2011 for the course CIV ENG 93 taught by Professor Staff during the Spring '08 term at Berkeley.

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Assignment 7 Solutions - CE93 - Engineering Data Analysis...

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