Question

A mobile computer network consists of a number of computers (called nodes) that communicate with each other while moving throughout a region. A node that is out of transmission range of the other nodes, so that it is unable to communicate, is said to be partitioned. In studies carried out at the Colorado School of Mines, S. Kurkowski found that in a network containing 190 nodes in which destinations were chosen at random from a uniform distribution, 19 nodes were partitioned. J. Norman found that in a network containing 167 nodes whose movements mimicked those on a college campus, 30 nodes were partitioned. Let Px represent the population proportion of partitioned nodes in the network that mimicked those on a college campus and let pyrepresent the population proportion of partitioned nodes in the network whose destinations were chosen at random. Find a 99% confidence interval for the difference px-py. Round the answers to four decimal places. The 99% confidence interval is (-1748 0163

Answer 1

Given, 01 - 190, 21-19, 12 = 167,08330, d. 0.01 The critical value for of = olol is tearing =21576 19 oil, P2 = 30 - 018 190 01 167 CI - or Petzo & C1-P), PCI - Pad 01 B2 17 C11-0118 1 21576 (0(1-001) 0.18 (1018) 190 167 & c-01174, 0.015 => 0:174 4 Pre-Py L01015