# QNT 561 Final Exam 3

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1. Which of the following measures of central location is affected most by extreme values qnt 561 final exam
2. A correlation matrix
3. In a set of observations, which measure of central tendency reports the value that occurs most often?
4. Which level of measurement is ….for the median?
5. The mean and the variance are equal in
6. The difference between the sample mean and the population mean is …..…
7. A dummy variable or indicator variable
8. A Type I error is
9. Which level of measurement is …..for the mode?
10. The weighted mean is a special case of what?
11. We use the general rule of multiplication to combine
12. A local trade union consists of plumbers and electricians. Classified according to rank: A member of the union is ….at random. Given that the person selected is an electrician, what is the probability that the person is a master?
13. Suppose a population consisted of 20 items. How many different samples of n = 3 are possible?
14. In the 1936 Presidential Election Franklin D. Roosevelt defeated Alfred E. Landon in a landslide vote. A Landon victory had been ……by the Literary Digest for qnt 561 final exam answers, a magazine that ran the oldest, largest, and most widely publicized of the polls at the time. The Digest’s final ……on 10 million sample ballots …..to prospective voters, and 2.3 million were returned. qnt 561 final exam The sample of voters was …..from lists of automobile and telephone owners. Despite the massive size of this sample, it ….to predict a Roosevelt victory, being off the mark by 19 percentage points. The Digest was wrong because
15. A discrete variable
16. In a study on the effect of reinforcement on learning from a company online training program, two experimental treatments are planned: reinforcement given after every learning module, or reinforcement given after every two learning modules. Reinforcement is …..with the addition of more examples of qnt 561 final exam questions. Which one of the following control groups would serve best in this study?
17. Which of the following is a correct statement about a probability?
18. The central limit theorem is important to market researchers because it states that as sample sizes increase, the distribution of the sample ________ …from consumers on any topic of interest being researched approaches the normal distribution.
19. To find confidence intervals for the mean of a normal distribution, the t distribution is usually …..in practical applications instead of the standard normal distribution because
20. In a two-sample test of means for independent samples, we use the z distribution when
21. The special rule of addition is used to combine
22. A sample of 5 companies were examined for changes in their relative market share. The results showed the following increases and decreases: –5, 10, 10, 5, –10.
23. A nominal scale variable
24. Bob is …..in opening a candy store in his town. qnt 561 final exam. He believes that his customers will spend an average of \$75 or more in annual purchases (the alternative hypothesis). Bob hires a consultant to test this belief. The consultant tested this conjecture on a sample of 100 customers and found the p-value for the test statistic satisfied p > .25, then…
25. The ratio scale of measurement
26. In the world of market research, the use of a questionnaire often plays a vital role in gaining useful business intelligence because
27. Which of the following is a requirement for a two-sample test of proportions?
28. The multiple standard error of estimate is
29. A carefully designed business experiment has just been ……. Unfortunately, use of alpha = .05 indicated no significant differences among four treatments. What useful information can you supply future investigators for qnt 561 final exam free when you report on this experiment?
30. We wish to develop a confidence interval for the population mean. qnt 561 final exam The population follows the normal distribution, the standard deviation of the population is 3, and we have a sample of 10 observations. We decide to use the 90% level of confidence. The appropriate value of to represent the level of confidence is