(question points): 23122100003 =1 1. (1.5 points) For a dataset (n = 10) with mean equal to 0 and 1x2 = 49, the variance is approximately equal to: (a) 4.9 (b) 2.21 (c) 7 (d) None of the remaining options is correct. (e) 49 2. (1.5 points) Trudeau is a dog that sniffs tree roots in search of truffles. The probability of Trudeau finding a truffle when sniffing a tree root is 0.05. Hence, the probability of having to sniff exactly 19 roots to find a truffle is approximately equal to: (a) 0.0285 (b) 0.9592 (c) 0.0245 (d) 0.0199 (e) 0.7537 3. (1.5 points) Let fx,y(x, y) be a joint probability function such that: Y\X 0 1 0 0.23 0.33 1 0.12 0.32