Applied Statistical Methods and Data Analytics I

Details & Practice: Exam 1 Applied Statistical Methods & Data Analytics I Details: Taken in-person from 3:30-4:50pm in 103 Mumford Hall on Tuesday, February 18 Comprised of multiple-choice and short-answer questions covering Chapters 1 – 3 Office hours before exam: Thursday 1-2pm and 3:30-5pm (link under ‘Zoom Meeting’ on Canvas) All types of calculators allowed, but phones are prohibited Equations shown on the last page of this practice exam will be provided Answers to the following practice questions will be posted on Friday Also study answers to In-Class Problem Sets (Chapters 1 – 3) posted under each week’s Module MULTIPLE CHOICE (2.5 pts. each): Indicate the answer choice that best completes the statement or answers the question. 1. In a questionnaire, respondents are asked to mark their gender as male or female. The scale of measurement for gender is _____ scale. a. ordinal b. nominal c. ratio d. interval 2. Height is an example of a variable that uses the _____ scale. a. ratio b. interval c. nominal d. ordinal 3. Statistical studies in which researchers do not control variables of interest are _____ studies. a. experimental b. random variable c. inferential d. observational 4. The height of a building, measured in feet, is an example of _____ data. a. categorical b. either categorical or quantitative c. neither categorical or quantitative d. quantitative 5. Statistical studies in which researchers control variables of interest are _____ studies. a. experimental b. random variable c. inferential d. observational 6. Data collected at the same, or approximately the same point in time are _____ data. a. time series b. approximate time series c. cross-sectional d. approximate 2 7. Data collected over several time periods are _____ data. a. time series b. time controlled c. cross-sectional d. periodic 8. The sum of the percent frequencies for all classes will always equal a. one. b. the number of classes. c. the number of elements in the study. d. 100. 9. The sum of the relative frequencies for all classes will always equal a. the sample size. b. 100%. c. one. d. any value larger than one. A sample of fifteen 7-year old boys shows their favorite superheroes: Spiderman Batman Iron Man Aquaman Spiderman Captain America Spiderman Superman Captain America Batman Aquaman Spiderman Spiderman Iron Man Spiderman 10. Which of the following is the correct frequency distribution? a. Spiderman 4, Batman 3, Iron Man 1, Aquaman 4, Captain America 3, Superman 1 b. Spiderman 6, Batman 2, Iron Man 2, Aquaman 2, Captain America 2, Superman 1 c. Spiderman 6, Batman 1, Iron Man 3, Aquaman 1, Captain America 2, Superman 2 d. None of these alternatives is correct. 11. Which of the following is the correct relative frequency for Spiderman? a. .27 b. .5 c. .4 d. .6 12. Which of the following is the correct percent frequency for Spiderman? a. 10% b. 27% c. 2% d. 40% 3 13. In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as a _____ line. a. determination b. trend c. control d. zero-bias 14. Histograms based on data on housing prices and salaries typically are a. skewed to the left. b. skewed to the right. c. stacked. d. symmetric. 15. The numbers of hours worked (per week) by 400 statistics students are shown below. Number of hours 0-9 10 - 19 20 - 29 30 - 39 Frequency 20 80 200 100 The cumulative percent frequency for students working 10 or more hours per week is a. 20%. b. 25%. c. 80%. d. 95%. 4 A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. Graduate School Yes No Total Business 70 182 252 Undergraduate Major Engineering Others 84 126 208 130 292 256 Total 280 520 800 16. Of those students who are majoring in engineering, what percentage plans to go to graduate school? a. 28.77 b. 10.5 c. 40.38 d. 71.23 17. Of those students who are planning on going to graduate school, what percentage are majoring in engineering? a. 10.5 b. 28.8 c. 30.0 d. 40.4