MAT 232 Final Exam

Statistic v. Parameter - Answer- Parameter is a numerical measurement describing some characteristics of a population and a statistic measures a sample. Qualitative v. Quantitative - Answer- Quantitative = numerical or measurements (quantity) Qualitative (or Categorical) = names or labels (not numbers that represent counts or measurements). Discrete v. Continuous data - Answer- Discrete = the data values are quantitative (numbers) and the number of values if finite. - Whole #, e.g. teeth in mouth, bones in body, etc. Continuous = infinitely many possible quantitative (numbers) values, where the collection of values is not countable. - "Measured to nearest", e.g. height, weight, age What are the levels of measurement? - Answer- 1. Nominal 2. Ordinal 3. Interval 4. Ratio ______ level is when the data cannot be arranged in order. Only categories. - Answer- Nominal _______ level is when the data can be arranged in order, but differences either can't be found or are meaningless. - Answer- Ordinal ______ level is when the differences in the data are meaningful, but there is no natural zero starting point and ratios are meaningless. - Answer- Interval _______ level is when (order + differences + ratios)- there is a natural zero starting point and ratios make sense. - Answer- Ratio Observational studies v. Experiments - Answer- Observation is when we observe and measure but do not modify and experiment is when there is an experimental condition to the research and we test a hypothesis or demonstrate a known fact. ________ sampling is when you subdivide population into strata with the same characteristics, then randomly sample within those strata.