STAT 200 Final Examination Answer Sheet

Record your answers and work. Problem Number Solution 1 Answer: (a) (ii) Density of people per square kilometer (b) (i) All countries in the world Justification for (a) and (b): (a): A variable is the measurement or observation of the individual(s). (b): The population is the set of values of the variable for the entire group of individuals. 2 Answer: (a) (ii) Nominal (b) (iii) Mode Justification for (a) and (b): (a): Since there are no numbers, no order to the data, and you cannot perform any arithmetic, it is a nominal measurement. (b): Since there are no numbers, you find the data value that occurs the most frequently in the data, this is called the mode. 3 Answer: (a) (iii) Ordinal (b) (ii) Statistic Justification for (a) and (b): (a): Even though 1 (being poor) and 5 (being excellent) uses numbers, they are really not numbers, but are used to assign numerical values to ordinal value. (b): It is a number that is taken from a sample and describes the sample. 4 Answer: (a) Cluster sampling (b) Cluster sampling is used because 10 classrooms are selected out of the individual first grade classes, and ALL of the children in each of the 10 selected classrooms are assessed. 5 Answer: (a) (iii) ANOVA (b) An ANOVA test is used when you’re trying to determine significant relationships between means of 3 or more samples. In this situation, we are comparing 10 different weight loss groups, so ANOVA would be the appropriate statistical approach.