# QNT 351 Final Exam Question and Answers

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QNT 351 Final Exam Questions and Answers – 30/30

1. What level of measurement is the number of auto accidents ….in a given month?
2. If two events A and B are mutually exclusive, what does the special rule of addition state?
3. For any data set, which measures of central location have only one value?
4. What is the variable use to predict the value of another …..?
5. A null hypothesis makes a claim about a
6. The performance of personal and business investments is measured as a percentage, return on investment. What type of variable is return on investment?
7. Twenty randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions, all on the same material. The professor was interested in determining on which type of questions the students scored higher. This experiment is an example of
8. A listing of all possible outcomes of an experiment and their corresponding probability of occurrence is ….
9. A small sample of computer operators shows monthly incomes of \$1,950, \$1,775, \$2,060, \$1,840, \$1,795, \$1,890, \$1,925, and \$1,810. What are these ungrouped numbers ….?
10. The mean of any uniform probability distribution is qnt 351 final exam
11. Monthly commissions of first-year insurance brokers are \$1,270, \$1,310, \$1,680, \$1,380, \$1,410, \$1,570, \$1,180, and \$1,420. These figures are refer to as
12. The test scores for a class of 147 students are ….. What is the location of the test score …..with the third quartile?
13. The names of the positions in a corporation, such as chief operating officer or controller, are examples of what level of measurement?
14. What is the chart called when the paired data (the dependent and independent variables) are plotted?
15. A sample of single persons receiving social security payments revealed these monthly benefits: \$826, \$699, \$1,087, \$880, \$839, and \$965. How many observations are below the median qnt 351 final exam?
16. For a hypothesis test comparing two population means, the combined degrees of freedom are 24. Which of the following statements about the two sample sizes is NOT true? qnt 351 final exam Assume the population standard deviations are equal.
17. What type of variable is the number of robberies ….in your city?
18. Which of the following conditions must be ….to conduct a test for the difference in two sample means?
19. Suppose we test the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what is our decision?
20. The National Center for Health Statistics reported that of every 883 deaths in recent years, 24 resulted from an automobile accident, 182 from cancer, and 333 from heart disease. Using the relative frequency approach, what is the probability that a particular death is due to an automobile accident?
21. For a standard normal distribution, what is the probability that z is greater than 1.75?
22. The main purpose of descriptive statistics is to qnt 351 final exam
23. The sum of the deviations of each data value from this measure of central location will always be 0.
24. The shape of any uniform probability distribution is
25. What is the level of significance?
26. The measurements of weight of 100 units of a product manufactured by two parallel processes have same mean but the standard of processAis 15 while that of B is 7. What can you conclude?
27. For the normal distribution, the mean plus and minus 1.96 standard deviations will include about what percent of the observations?
28. A dot plot shows
29. The general process of gathering, organizing, summarizing, analyzing, and interpreting data is qnt 351 final exam
30. Shoe sizes, such as 7B, 10D, and 12EEE, are examples of what level of measurement? 