Find the condition number of the matrix A [ 1 k] 1 1 ' k * 1. Observe how the condition number depends on the value of k. For what values of k is c(A) > 100?

Statistics is the science of collecting, classifying, presenting and interpreting data. Where Does Data Come From • Individuals o The objects described by a set of data. The objects can be people, animals or things. • Variable o Any characteristic of an individual. Variables can take different values for different individuals. Data Sources • Observational Study o Observes individuals and measures variables of interest but does not attempt to influence the responses. o The purpose of an observational study is to describe some group/situation. • Sample Survey o A sample survey is a type of observational study in which a sample is selected