Quantitative Research Techniques and Statistics Questions with Complete Solutions

Quantitative Research Techniques and Statistics Questions with Complete Solutions A company has developed a new smartphone whose average lifetime is unknown. In order to estimate this average, 200 smartphones are randomly selected from a large production line and tested; their average lifetime is found to be 5 years. The 200 smartphones represent a __________. - Correct Answers sample 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 statements involve descriptive statistics as opposed to inferential statistics? - Correct Answers The Alcohol, Tobacco and Firearms Department reported that Houston had 1,791 registered gun dealers in 1997. A population of all college applicants exists who have taken the SAT exam in the United States in the last year. A parameter of the population are __________. - Correct Answers SAT scores Which of the following statements is true regarding the design of a good survey? - Correct Answers The questions should be kept as short as possible 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 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, the best sampling strategy would be to use a __________. - Correct Answers stratified random sample Which of the following types of samples is almost always biased? - Correct Answers Self-selected samples _________ is an expected error based only on the observations limited to a sample taken from a population. - Correct Answers sampling error