QMB 3200 Final Exam Questions & Answers | Verified by Experts 2024

Suppose we have the following data: 12, 17, 13, 25, 16, 21, 30, 14, 16, and 18. To find the 10% trimmed mean, what numbers should be deleted from the calculation? - 12 and 30 Which of the following is not resistant to the outliers in a data set? a. Median b. Mean c. Variance d. Interquartile range - b. mean The pth percentile is a value such that at least p percent of the observations are: - less than or equal to this value. Which of the following provides a measure of central location for the data? a. Mean b. Variance c. Mode d. Standard deviation - a. mean When testing water for chemical impurities, results are often reported as BDL, that is, below detection limit. The following data set gives the measurements of the amount of lead in a series of water samples taken from inner-city households (ppm): 5, 7, 12, BDL, 10, 8, BDL, 20, 6 Which of the following is correct? a. The mean lead level in the water is about 10 ppm. b. The median lead level in the water is 8 ppm. c. The mean lead level in the water is about 8 ppm. d. The median lead level in the water is 7 ppm. - d. The median lead level in the water is 7 ppm.