MKTG 320 Lecture Notes - Lecture 6: Non-Sampling Error, A.D. Vision, Observational Error
Document Summary
Survey one of 3 main methods for gathering data other 2 = data or experimentation. Error: , difference between population mean and actual mean. Sampling often used cuz don"t have time, money. In sampling you might not have a good representation. The larger the sample size, the smaller amount of error there will be. Essentially you are more likely to choose people who look like people you want to talk to. Population specification error: sample of people 60 and over to find out about retired people, but people today might not be retired by 60, so poor sample selection. Have to define who you need to talk to very carefully. Frame error: imaginary list of people who represent our population, so sample frame of college of students is a list of the students at the college of. Difficult to always find perfect list, for example mothers in.
