Fall 2013 Final Exam Solutions - Fall 2013 Final Exam Solutions STAT 225 Name Choose your Section Time(Circle one 7:30 Whitney 10:30 Pan 12:30 Allison

Fall 2013 Final Exam Solutions - Fall 2013 Final Exam...

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Fall 2013 Final Exam Solutions STAT 225 December 13, 2013 Name: Choose your Section Time: (Circle one) 7:30 Whitney 10:30 Pan 12:30 Allison 3:30 Xiang 8:30 Patrick 10:30 Jeremy 1:30 Mike 4:30 Xiang 9:30 Pan 11:30 Jeremy 2:30 Mike ONLINE Directions 1. Show your work on ALL questions. Unsupported work will NOT receive full credit. 2. Decimal answers should be exact, or to exactly 4 significant digits. 3. You are responsible for upholding the Honor Code of Purdue University. This includes protecting your work from other students. 4. Please write legibly. If a grader cannot read your writing, NO credit will be given. 5. You are allowed the following aids: (a) a one-page 8.5“x11” handwritten cheat sheet (b) Scientific Calculator (in accordance with the syllabus) (c) Pencils or pens 6. Cheat sheets with photocopied or printed information are not allowed and are subject to disciplinary actions as specified in the syllabus. 7. Instructors will not interpret questions for you. If you do have questions, wait until you have looked over the whole exam so that you can ask all your questions at one time. 8. Turn off your cell phone before the exam begins. Problem Points Possible Points Earned 1 11 2 15 3 13 4 12 5 13 6 and 7 6 8 and 9 5 10 7 Cheat Sheet 2 Total 84 1
Problem 1Fill in the blank with thecapitalletter associated with the word from the following list thatbestillustrates the given scenario.(1 point for each answer) A. Variance B. Covariance C. Correlation D. IQR E. SD F. r 2 G. Crosstabs H. Boxplot I. Histogram J. Pie Chart K. Bar Graph L. Line Graph M. Scatterplot N. SRS O. Stratified Sampling P. Convenience Sampling Q. Cluster Sampling R. Probability Sampling S. Qualitative T. Quantitative U. Nominal V. Ordinal W. Interval X. Ratio Y. Skewed-right Z. Symmetric a. Which graphical display is most appropriate to represent the relationship between time spent daydreaming and time spent on the phone in class? M. Scatterplot b. What could tell you the strength of the relationship between time spent daydream- ing and time spent on the phone in class? C. Correlation c. The number of times that Maxine wants to play fetch in a day is what type of variable? T. Quantitative d. Noah divided the animal kingdom into species and gender, then randomly picked 1 from each combination. What sampling technique did he use? O. Stratified Sampling e.

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