MATH 225N WEEK 1 ASSIGNMENT STATISTICS QUESTIONS AND CORRECT ANSWERS

MATH 225N WEEK 1 ASSIGNMENT STATISTICS QUESTIONS AND CORRECT ANSWERS 1. In reference to different sampling methods, systematic sampling includes the steps: list the members of the population; use simple random sampling to select a starting point in the population; let k = (number of individuals in the population)/(number of individuals needed in the sample); choose every kth individual in the list starting with the one that was randomly selected. Answer Explanation Correct answer: True 2. When is cluster sampling appropriate? Cluster sampling is a good choice when the population has multiple distinct groups that are each likely to be representative of the population as a whole. 3. William is studying the hair colors of all students attending his college. He collects data from the 25 students in his statistics class. Which type of sampling is used? Ans : Convenience sampling 4. When is stratified sampling appropriate? Correct answer: Stratified sampling is a good choice when the population has multiple distinct groups that are internally homogenous but not representative of the population as a whole.