The frog wants to send a gift to the princess. He needs to jump a total distance of 10 meters to reach her. Suppose that each time, the frog independently generates a random variate from the normal distribution N(1,1). If the generated variate is below zero, the frog will jump away from the princess. If the generated variate is above zero, the frog will jump towards the princess. The distance that the frog covers in each jump is the absolute value of the variate. Calculate the probability that after two jumps, the frog has still not reached the princess.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The frog wants to send a gift to the princess. He needs to jump a total distance of 10 meters to reach her. Suppose that each time, the frog independently generates a random variate from the normal distribution N(1,1). If the generated variate is below zero, the frog will jump away from the princess. If the generated variate is above zero, the frog will jump towards the princess. The distance that the frog covers in each jump is the absolute value of the variate. Calculate the probability that after two jumps, the frog has still not reached the princess.

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