Question

Question 1 1 pts THIS PROBLEM IS TO POINT OUT AN ERROR IN A TEXTBOOK EXAMPLE Leah's answering machine receives about six telephone calls between 8am and 10am. What is the probability that Leah receives more than one call, which is 2 or more, in the next 15 minutes. (this is the problem on Ch4 page 266-267) To get the correct answer the poisson distribution function gives you the cumulative distribution from 0 to 1 call you want the probability of more than 1, which is 2 or more, hence the 1-poissoncdf. When the question asks more than you use the cumulative distribution function, but you need to do 1-poissoncdf(.75.1). You want the probability of 2 to infinity minus the probability of O and 1calls. If you are using a TI Nspire you will enter 1-poisscdf(0.75,0.1) to get the 0.1734 number.

Answer 1

last line is wrong , the formula will be P(x > 1). P(x > 1) = 0.1734 , because if you minus 1 from 0.75,0,1 answer will be -0.75