# Understandable Statistics Concepts and Methods 12th Edition by Charles Henry Brase – Test Bank

ISBN-13: 978-1337119917 ISBN-10: 1337119911

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## Understandable Statistics Concepts and Methods 12th Edition by Charles Henry Brase – Test Bank

Chapter 3 – Averages and Variation

 1. How hot does it get in Death Valley? Assume that the following data are taken from a study conducted by the National Park System, of which Death Valley is a unit. The ground temperatures  were taken from May to November in the vicinity of Furnace Creek. Compute the median for these ground temperatures. Round your answer to the nearest tenth. 148 151 168 173 194 178 193 194 178 178 168 163 151 144   a.  159.5   b.  168.0   c.  193.5   d.  341.0   e.  170.5 ANSWER:   e POINTS:   1 DIFFICULTY:   Easy QUESTION TYPE:   Multi-Mode (Multiple choice) HAS VARIABLES:   True LEARNING OBJECTIVES:   13.26 – Find the median NOTES:   Application DATE CREATED:   11/4/2013 1:55 AM DATE MODIFIED:   10/13/2016 10:24 AM
 2. The Grand Canyon and the Colorado River are beautiful, rugged, and sometimes dangerous. Assume there is a physician at the park clinic in Grand Canyon Village. Suppose the physician has recorded (for a 5-year period) the number of visitor injuries at different landing points for commercial boat trips down the Colorado River in both the Upper and Lower Grand Canyon. Upper Canyon: Number of injuries per Landing Point Between North Canyon and Phantom Ranch 2 3 1 1 3 4 8 11 3 1 3   Lower Canyon: Number of injuries per Landing Point Between Bright Angel and Lava Falls 10 1 1 0 8 9 2 11 3 0 1 10 2 1 The mean, median, and mode for Upper Canyon are 3.636, 3.0, and 3, respectively. The mean, median, and mode for Lower Canyon are 4.286, 2.0, and 1, respectively. Compare the mean, median, and mode found in Upper Canyon and Lower Canyon, respectively.   a.  Lower Canyon mean is smaller than Upper Canyon, Lower Canyon median is smaller than Upper Canyon, and Lower Canyon mode is smaller than Upper Canyon.   b.  Lower Canyon mean is greater than Upper Canyon, Lower Canyon median is greater than Upper Canyon, and Lower Canyon mode is smaller than Upper Canyon.   c.  Lower Canyon mean is greater than Upper Canyon, Lower Canyon median is smaller than Upper Canyon, and Lower Canyon mode is greater than Upper Canyon.   d.  Lower Canyon mean is greater than Upper Canyon, Lower Canyon median is smaller than Upper Canyon, and Lower Canyon mode is smaller than Upper Canyon.   e.  Lower Canyon mean is greater than Upper Canyon, Lower Canyon median is greater than Upper Canyon, and Lower Canyon mode is greater than Upper Canyon. ANSWER:   d POINTS:   1 DIFFICULTY:   Easy QUESTION TYPE:   Multi-Mode (Multiple choice) HAS VARIABLES:   True LEARNING OBJECTIVES:   13.27 – Compare mean, median, and mode between two records NOTES:   Application DATE CREATED:   11/4/2013 1:55 AM DATE MODIFIED:   3/18/2014 7:58 AM
 3. The Grand Canyon and the Colorado River are beautiful, rugged, and sometimes dangerous. Assume there is a physician at the park clinic in Grand Canyon Village. Suppose the physician has recorded (for a 5-year period) the number of visitor injuries at different landing points for commercial boat trips down the Colorado River in both the Upper and Lower Grand Canyon. Compute a 5% trimmed mean for Upper Canyon and Lower Canyon. Round your answer to the nearest thousandth. Upper Canyon: Number of injuries per Landing Point Between North Canyon and Phantom Ranch 2 3 1 1 3 4 9 12 3 1 3   Lower Canyon: Number of injuries per Landing Point Between Bright Angel and Lava Falls 11 1 1 0 9 10 2 13 3 0 1 12 2 1   a.  The 5% trimmed mean for Lower Canyon is 3.333 and for Upper Canyon is 5.583.   b.  The 5% trimmed mean for Lower Canyon is 2.727 and for Upper Canyon is 4.786.   c.  The 5% trimmed mean for Lower Canyon is 2.636 and for Upper Canyon is 3.857.   d.  The 5% trimmed mean for Lower Canyon is 3.222 and for Upper Canyon is 4.417.   e.  The 5% trimmed mean for Lower Canyon is 4.417 and for Upper Canyon is 3.222. ANSWER:   e POINTS:   1 DIFFICULTY:   Easy QUESTION TYPE:   Multi-Mode (Multiple choice) HAS VARIABLES:   True LEARNING OBJECTIVES:   13.28 – Compute 5% timed mean for the sample NOTES:   Application DATE CREATED:   11/4/2013 1:55 AM DATE MODIFIED:   3/6/2014 4:43 AM
 4. In your biology class, your final grade is based on several things: a lab score, score on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 30% of your total grade, each major test is worth 22.5%, and the final exam is worth 25%. Compute the weighted average for the following scores: 92 on the lab, 85 on the first major test, 90 on the second major test, and 84 on the final exam. Round your answer to the nearest hundredth.   a.  89.98   b.  85.58   c.  87.58   d.  87.98   e.  86.85 ANSWER:   d POINTS:   1 DIFFICULTY:   Easy QUESTION TYPE:   Multi-Mode (Multiple choice) HAS VARIABLES:   True LEARNING OBJECTIVES:   13.29 – Note the weighted average NOTES:   Application DATE CREATED:   11/4/2013 1:55 AM DATE MODIFIED:   3/6/2014 4:45 AM
 5. Find the range for the following sample data. 2317113027   a.  10   b.  7   c.  6   d.  3   e.  19 ANSWER:   e POINTS:   1 DIFFICULTY:   Easy QUESTION TYPE:   Multi-Mode (Multiple choice) HAS VARIABLES:   True LEARNING OBJECTIVES:   13.30 – Find the range NOTES:   Skill DATE CREATED:   11/4/2013 1:55 AM DATE MODIFIED:   3/6/2014 4:46 AM

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