BMAL 590 Quantitative Research Techniques and Statistics Exam Questions with Correct Answers

BMAL 590 Quantitative Research Techniques and Statistics Exam Questions with Correct Answers A company has developed a new computer sound card whose average lifetime is unknown. In order to estimate this average, 200 sound cards are randomly selected from a large production line and tested; their average lifetime is found to be 5 years. The five years represents a - Correct Answers Statistics A summary measure that is computed from a population is called a - Correct Answers Parameter Which of the following is a measure of the reliability of a statistical inference? - Correct Answers A significance level The process of using sample statistics to draw conclusions about population parameters is called - Correct Answers Doing inferential statistics Which of the following represents a population, as opposed to a sample? - Correct Answers All registered voters in the State of Michigan A study in under way to determine the average height of all 32,000 adult pine trees in a certain national forest. The heights of 500 randomly selected adult pine trees are measured and analyzed. The sample in this study is - Correct Answers The 500 adult pine trees selected at random selected at random from this forest The significance level of a statistical inference measures - Correct Answers The proportion of times a conclusion about a population will be wrong in the long run The confidence level of a statistical inference measures - Correct Answers The proportion of times an estimation procedure will be correct in the long run A marketing research firm selects a random sample of adults and asks them a list of questions regarding their beverage preferences. What type of data collection is involved here? - Correct Answers A survey Which of the following statements is true regarding the design of a good survey? - Correct Answers All of these choices are true Which method of data collection is involved when a researcher counts and records the number of students wearing backpacks on campus on a given day? - Correct Answers Direct observation The difference between a sample mean and the population mean is called - Correct Answers Sampling error The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a videocassette recorder over the past 12 months are satisfied with their products. If there are four different brands of videocassette recorders made by the company,