CS 480 Homework 4

Assigned: 3 November 2017   Due: 15 November 2017

These homework problems are to be done individually, not in pairs or other groups.

  1. Exercise 10.3 parts a. and b.
  2. A doctor says that an infant who predominantly turns her head to the right while lying on her back will be right-handed and one who predominantly turns her head to the left will be left-handed. Given that 90% of the population is right-handed, what is baby Willa's probability of being right-handed, given that she predominantly turns her head to the left assuming that the test is 90% accurate? What if the test is 80% accurate? Show your work and explain your results.

    You will want to use ideas from pg 496-8 in your textbook. Note that you will need to use the normalization result:

        P(M|s) = P(s|m)P(m) / (P(s|m)P(m) + P(s|not m)P(not m))