Question

#1

ULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) To monitor campus security, the campus police office is taking a survey of the number of students in a parking lot each 30 minutes of a 24-hour period with the goal of determining when patrols of the lot would serve the most students. If X is the number of students in the lot each period of time, then X is an example of A) a continuous variable. C) a statistic. B) a categorical variable. Dya discrete variable. 2) The chancellor of a major university was concerned about alcohol abuse on her campus and 2) wanted to find out the proportion of students at her university who visited campus bars on the weekend before the final exam week. Her assistant took a random sample of 250 students. The answer on "whether you visited campus bars on the weekend before the final exam week" from students in the sample is an example of A) a table of random numbers C) a categorical variable B) a continuous variable D) a discrete variable 3) Which of the following is NOT a reason for the need for sampling? 3) A) It is always more informative by investigating a sample than the entire population. B) It is usually too time consuming to look at the whole population. C) It is sometimes destructive to observe the entire population. D) It is usually too costly to study the whole population. 4) 4) Which of the following sampling methods is a probability sample? B) Judgment sample D) Quota sample A) Convenience sample C) Stratified sample 5) 5) A study is under way in Yosemite National Forest to determine the adult height of American pine trees. Specifically, the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall. It is estimated that the forest contains 25,000 adult American pines. The study involves collecting heights from 250 randomly selected adult American pine trees and analyzing the results. Identify the sample in the study A) The 25,000 adult American pine trees in the forest. ) AlL American pine trees, of any age, in the forest.

Answer 1