Liberty University Online Academy

BMAL 590

Section 1: What is Statistics?

1)You take a random sample of 100 students at your university and find that their average GPA is 3.1. If you use this information to help you estimate the average GPA for all students at your university, then you are doing what branch of statistics?

2. The significance level of a statistical inference measures

3. The confidence level of a statistical inference measures

4. 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 200 sound cards represent a

5. 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

6. A summary measure that is computed from a population is called a

7. Which of the following is a measure of the reliability of a statistical inference?

8. The process of using sample statistics to draw conclusions about population parameters is called

9. A summary measure that is computed from a sample to describe a characteristic of the population is called

10. A website poll is accurate 99 times out of 100 which means                                                .

11. Which of the following is not a goal of the descriptive statistics?

12.             are utilized to make inferences about certain population parameters.

13. Statistics is best described as a                          to help analyze numbers.

14. 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

15. Which of the following is a measure of the reliability of a statistical inference?