MATH 103 Midterm: MATH 103 UPenn 103Exam1Fall 13
32 views5 pages
Document Summary
Answers at the end: x is a continuous random variable on the interval [0,1] whose density function is of the form kx2 for some constant k. what is var(x), 1. 80: a geiger counter clicks, on the average, every 15 seconds. (the number of clicks is a poisson process. ) Let x be the total number of clicks of three such geiger counters in a minute. How many clicks per minute is one standard deviation of x: 8, 45, 12, 6, 12, 45, 8, 6, find. When your guest arrives at your oor you ask if he had to wait longer than 6 minutes for the elevator. What is the probability that he had to wait at least 3 minutes: 1/2, e 2, (e 1)/(e 2, e 1 e 2, (e 1)/(e 2, (e 1 e 2)/(e 2 1, (e 2)/(e 1, (e 1 e 2)/(1 e 2) 1: a computer manufacturer assembles two kinds of computers, a and b.
