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STAT 251G Online Class Exam 1 Part II: Chapters 1 - 3

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Question;Show all work when appropriate. You may type your answers onto the test, or complete it by hand and submit a scanned copy.1. Given the following boxplot where m is the median value, what statement could be made about the distribution of the data? Explain your answer.2. The Colorado State Legislature wants to estimate the length of time it takes a resident of Colorado to earn a bachelor?s degree from a state college or university. A random sample was taken of 265 recent in-state graduates. a) Identify the variable. b) Is the variable quantitative or qualitative? c) What is the implied population? 3. For the information in parts (a) through (g) below, list the highest level of measurement as ratio, interval, ordinal, or nominal, and explain your choice. A student advising file contains the following information: (a) Name of student (b) Student I.D. number (c) Cumulative grade point average (d) Dates of awards (scholarships, dean?s list, etc.) (e) Declared major (f) A number code representing class standing:1 = freshman, 2 = sophomore, 3 = junior,4 = senior, 5 = graduate student (g) Entrance exam rating for competency in English:excellent, satisfactory, unsatisfactory 4. Exam Scores For 108 randomly selected college students, this exam score frequency distribution was obtained. ClassLimits ClassBoundaries frequency 90?98 89.5 - 98.5 6 94 8836 99?107 98.5 - 107.5 22 103 10609 108?116 107.5-116.5 43 112 12544 117?125 116.5-125.5 28 121 14641 126?134 125.5-134.5 9 130 16900 Find by using the correct formulas:Be sure to show all work.a) meanb) modal classc) varianced) standard deviatione) construct a histogramf) discuss the shape of the distribution5. Stories in the World?s Tallest Buildings The number of stories in each of the world?s 30 tallest buildings is listed below.88 88 110 88 80 69 102 78 70 5579 85 80 100 60 90 77 55 75 5554 60 75 64 105 56 71 70 65 72a) Construct a stem-and-leaf plotb) Find the 5-number summaryc) Construct a box-and-whiskers-plotd) Check for outlierse) Discuss the shape of the distribution

 

Paper#61826 | Written in 18-Jul-2015

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