The CDF as it approaches negative infinity is 1. O a. True O b. False "A Gaussian (20, 9) random variable has a standard deviation of" O a. 20 O b.9 O C. 81 O d. 3 The variance of an exponential random variable with lambda = 1/2 is O a. 2 O b.1 O c. 8 O d.4

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