DeVry University, ChicagoENGL 216Week 1_ Test_Statistics for Decision-Making

1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 1/11 WEEK 1: HOMEWORK Due Jan 13 at 11:59pm Points 40 Questions 20 Available Jan 6 at 12a ...

1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 1/11 WEEK 1: HOMEWORK Due Jan 13 at 11:59pm Points 40 Questions 20 Available Jan 6 at 12am ­ Mar 2 at 11:59pm about 2 months Time Limit None Allowed Attempts Unlimited Instructions Attempt History Attempt Time Score KEPT Attempt 3 13 minutes 32 out of 40 LATEST Attempt 3 13 minutes 32 out of 40 Attempt 2 21 minutes 28 out of 40 Attempt 1 25 minutes 30 out of 40 Score for this attempt: 32 out of 40 Submitted Jan 13 at 10:31pm This attempt took 13 minutes. Click here to work on the homework set. You can re­do this assignment as often as you need. Be sure to have the Week 1 Excel spreadsheet available to help with the calculations. It is provided in Week 1: Resources. Take the Quiz Again Question 1 2 / 2 pts The average age of all employees at a local store would be considered a: Statistic Sample1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 2/11 Correct! Correct! Parameter Population Question 2 2 / 2 pts In a survey of 1000 adults, 34% found they prefer charcoal to gas grills. The 1000 would be considered a: Correct! Correct! Sample Statistic Population Parameter Question 3 0 / 2 pts Inferential statistics is when sample data is used to: Calculate a mean Correct Answer Correct Answer Say something about the population Y You Answered ou Answered Determine when an event is most likely to occur Influence a decision maker1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 3/11 Question 4 2 / 2 pts The hair color of the players on a tennis team would be considered: Ordinal data Correct! Correct! Nominal data Interval data Ratio data Question 5 0 / 2 pts Marriage status (married, single, etc.) of the faculty at a university would be considered: Y You Answered ou Answered Ordinal data Correct Answer Correct Answer Qualitative data Quantitative data Ratio data Question 6 0 / 2 pts The nationalities (for example, Asian, European, etc.) listed in a recent survey would be considered:1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 4/11 Correct Answer Correct Answer Nominal data Y You Answered ou Answered Ordinal data Ratio data Interval data Question 7 2 / 2 pts Sixteen students are randomly selected from each grade level at a high school and asked about their eating habits. This sampling technique is called: Convenience Correct! Correct! Stratified Cluster Random Question 8 2 / 2 pts Cameras are set up to watch an intersection and determine how many cars are let through with each green light interval. This study design would be considered: Survey Correct! Correct! Observational1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 5/11 Experimental Simulation Question 9 2 / 2 pts Which of the following would be the mean of this data set: 5, 7, 12, 56, 4, 2, 33, 21 Correct! Correct! 17.5 140.0 8.0 18.7 Question 10 2 / 2 pts Which of the following would be the standard deviation of this sample data set: 67, 54, 30, 77, 92, 41, 75, 81 Correct! Correct! 21.2 517.0 19.9 64.61/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 6/11 Question 11 2 / 2 pts Which of the following would be the variance of this population data set: 3, 6, 8, 9, 4, 5, 7, 1, 9, 7, 5, 4, 13, 9 12.00 9.49 Correct! Correct! 8.82 2.97 Question 12 2 / 2 pts The difference between cluster sampling and stratified sampling would be: Cluster divides the population into groups and uses all in selected group while stratified uses some only in selected groups. Each divides the population into groups. Stratified sampling uses some in each group while cluster uses all in selected groups. Correct! Correct! There is no difference. It is two names for the same type of sampling. Each divides the population into groups. Cluster sampling uses some in each group while stratified uses all in selected groups.1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 7/11 Question 13 0 / 2 pts If data set A has a larger mean than data set B, what would be different about their distributions? The distribution of data set A would generally be to the left of the distribution of data set B Y You Answered ou Answered Data set A would have flatter distribution with more data in each tail The distribution of data set A would generally be to the right of the distribution of data set B Correct Answer Correct Answer Data set A would have more data near the center of the distribution Question 14 2 / 2 pts In a normally distributed data set a mean of 55 where 99.7% of the data fall between 47.5 and 62.5, what would be the standard deviation of that data set? Correct! Correct! 2.5 5.0 5.7 7.51/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 8/11 Question 15 2 / 2 pts Which of the following data sets would you expect to have the highest standard deviation? The number of phones a person owns Amount of soda in an unopened can (in ounces) Correct! Correct! Ages of people taking college classes (in years) Weight of an orange (in ounces) Question 16 2 / 2 pts Which data outcome of the speed of cars would best support removing a speed camera? High mean with small standard deviation Low mean with high standard deviation High mean with high standard deviation Correct! Correct! Low mean with low standard deviation Question 17 2 / 2 pts In manufacturing, convenience sampling could be used to determine if the machines are operating correctly. Which of the following best describes this type of sampling?1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 9/11 Products are put into groups and some are randomly selected from each group Every 10th product in the line is selected Products are put into groups and all are included from several randomly selected groups Correct! Correct! Samples are randomly selected throughout the day Question 18 2 / 2 pts A graph shows a line connecting the tops of vertical bars with the number of data points on the y­axis and groups on the x­axis. This graphic is most likely to be: A stem­leaf plot A frequency histogram Correct! Correct! A frequency polygon A dot plot Question 19 2 / 2 pts Match the terms and their definitions Vertical bar chart that shows frequency on the yCorrect! Correct! Histogram1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 10/11 axis A sample where the population is divided into groups and several groups are randomly selected from all from those selected groups are sampled Correct! Correct! Cluster sample Collection of all counts that are of interest Correct! Correct! Populaƭon A subset or part of a population Correct! Correct! Sample A sample where the population is divided into groups and several are randomly sampled form each group Correct! Correct! Straƭfied sample Consists of attributes, labels, or nonnumerical entries Correct! Correct! Qualitaƭve data Question 20 2 / 2 pts Match the terms and their definitions The most frequent number appearing in a dataset Correct! Correct! Mode Correct! Correct! The average Mean1/13/2019 Week 1: Homework: Statistics for Decision-Making - 10558 https://devryu.instructure.com/courses/36675/quizzes/122841 11/11 The percentage of data that falls within 1, 2, or 3 standard deviations of the mean in a symmetrical, bell­shaped distribution Correct! Correct! Empirical Rule The square root of the variance Correct! Correct! Standard deviaƭon Show how far a particular data point is from the mean in terms of the number of standard deviations Correct! Correct! Standard score Quiz Score: 32 out of 40