MATH 221 Week 1 Homework; Statistics for Decision-Making

1. Question:The average age of all employees at a local store would be considered: 2. Question:A survey of 1050 students was taken from a university with 19,500 students. The 19,500 would be considered a 3. Question:Inferential statistics is when sample data is used to 4. Question:The ages of 20 first graders would be considered: 5. Question:Marriage status (married, single, etc.) of the faculty at a university would be considered: 6. Question:The final grades for students in a statistics class would be considered: 7. Question:Sixteen students are randomly selected from each grade level at a high school and asked about their eating habits. This sampling technique is 8. Question:A personnel director at a large company would like to determine whether the company cafeteria is widely used by employees. She calls each employee and asks them whether they usually bring their own lunch, eat at the company cafeteria, or go out for lunch. This study design would be considered 9. Question:Which of the following would be the mean of this data set: 5, 28, 12, 56, 4, 2, 30, 21 10. Question:Which of the following would be the standard deviation of this sample data set: 67, 54, 30, 77, 92, 41, 75, 81 11. Question: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. Question:What is the relationship between variance and standard deviation? 13. Question:If data set A has a larger mean than data set B, what would be different about their distributions? 14. Question:In a normally distributed data set with a mean of 24 and a standard deviation of 4.2, what percentage of the data would be between 15.6 and 32.4 and why? 15. Question:Which of the following data sets would you expect to have the highest standard deviation? 16. Question:Which data outcome of stock prices would best support the idea that there is more risk with that stock? 17. Question:In manufacturing, systematic sampling could be used to determine if the machines are operating correctly. Which of the following best describes this type of sampling? 18. Question:A graph shows a line connecting the tops of vertical bars with the number of data points on the y-axis and groups on the x-axis. This graphic is most likely to be: 19. Question:Match the terms and their definitions: • Vertical bar chart that shows frequency on the y-axis • A sample where the population is divided into groups and several groups are randomly selected from all from those selected groups are sampled • Collection of all counts that are of interest • A subset or part of a population • A sample where the population is divided into groups and several are randomly sampled form each group • Consists of attributes, labels, or non-numerical entries 20. Question:Match the terms and their definitions: • The most frequent number appearing in a dataset • The average • The percentage of data that falls within 1, 2, or 3 standard deviations of the mean in a symmetrical, bell-shaped distribution • The square root of the variance • Show how far a particular data point is from the mean in terms of the number of standard deviations