Q.2) What are business problems in which the application of Chi ? Square statistic is appropriate?
Chi squared can be used in the office when hypothesis testing. Chi squared tests whether outcome frequencies follow a specific distribution. Let's say that we are trying to test at least 2 different things and then from there we need to find out if what we had just tested is even right-which then we would use the Goodness of fit test. Measures of goodness of fit typically summarize the discrepancy between observed values and the values expected under the model in question. I, personally, really like the goodness of fit test because I always second guess myself wondering if what I just tested even made any sense, so this test will resolve that i