Math 120 Statistics questions with correct answers 100%

convenience sampling - Correct Answer is a type of non-probability sampling that involves the sample being drawn from that part of the population that is close to hand. cluster sampling - Correct Answer Cluster sampling is used in statistics when natural groups are present in a population. The whole population is subdivided into clusters, or groups, and random samples are then collected from each group. good for huge population not accurate because can miss whole portions of population (sampling is like stratified sampling, but the idea is that entire groups are selected as opposed to individuals.) stratified sampling - Correct Answer A type of probability sampling in which the population is divided into groups with a common attribute and a random sample is chosen within each group systematic sampling - Correct Answer Systematic sampling is a probability sampling method where the elements are chosen from a target population by selecting a random starting point and selecting other members after a fixed 'sampling interval'. Sampling interval is calculated by dividing the entire population size by the desired sample size. Why do statisticians prefer to select samples by a random process? - Correct Answer Its ease of use and accuracy of representation.It is more accurate every member of the larger population has an equal chance of being selected. qualitative data - Correct Answer categorical data / Information describing color, odor, shape, or some other physical characteristic Quantitative data - Correct Answer are always numbers. Quantitative data are the result of counting or measuring attributes of a population.Quantitative data may be either discrete or continuous. discrete data - Correct Answer Numerical data values that can be COUNTED continuous data - Correct Answer Numerical data values that can be MEASURED may include fractions, decimals, or irrational numbers.Continuous data are often the results of measurements like lengths, weights, or times. voluntary response bias - Correct Answer bias introduced to a sample when individuals can choose on their own whether to participate in the sample sampling bias - Correct Answer A problem that occurs when a sample is not representative of the population from which it is drawn.