MATH 221 Week 1 Homework

1. Question: The age of every fourth person entering a department store. The selected individuals would be considered a: 2. Question: The chances of winning the Maryland lottery are one chance in twenty-two million. The probability would be considered an example of: 3. Question: The milligrams of tar in 30 cigarettes would be considered: 4. Question: Marriage status (married, single, etc.) of the faculty at a university would be considered: 5. Question: Sixteen students are randomly selected from each grade level at a high school and asked about their eating habits. This sampling technique is called: 6. Question: A researcher obtained a random sample of 100 smokers and a random sample of 100 non-smokers. After interviewing all 200 participants, the researcher compared the rates of depression between the two groups. This study design would be considered: 7. Question: Which of the following would be the mean of this data set: 5, 28, 12, 56, 4, 2, 30, 21 8. 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 9. Question: What is the relationship between variance and standard deviation? 10. 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? 11. Question: Which data outcome of the speed of cars would best support installing a speed bump? 12. Question: 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? 13. Question: A graph shows a number line with a mark for each data value in the data set above its value. This graphic is most likely to be: 14. Question: Match the terms and their definitions 15. Question: Match the terms and their definitions