1. 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 f
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1. 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 blank .
o Sample
2. Which of the following is a measure of the reliability of a statistical inference?
o A Significance Level
3. The process of using sample statistics to draw conclusions about population parameters is called blank .
o doing inferential statistics
4. Which of the following statements involve descriptive statistics as opposed to inferential statistics?
o The Alcohol, Tobacco and Firearms Department reported that Houston
had 1,791 registered gun dealers in 1997.
5. 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 blank .
o SAT Scores
6. Which of the following statements is true regarding the design of a good survey?
o The questions should be kept as short as possible
7. 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?
o Direct observation
8. 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 blank .
o stratified random sample
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