MATH302 Week 2 Knowledge Check Homework Practice Questions

1. Question: What was the sampling method that was used in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed. 2. Question: What kind of data is "the colors of the houses around the park" in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed. 3. Question: "Number of times per week" is what type of data in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed. 4. Question: What is the sampling method used in the following scenario? The librarian at a public library wants to determine what proportion of the library users are children. The librarian has a tally sheet on which she marks whether books are checked out by an adult or a child. She records this data for every fourth patron who checks out books. 5. Question: Duration (amount of time) is what type of data in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed. 6. Question: A Lake Tahoe Community College instructor is interested in the mean number of days Lake Tahoe Community College math students are absent from class during a quarter. X = number of days a Lake Tahoe Community College math student is absent The instructor's sample produces a mean number of days absent of 3.5 days. This value is an example of a: 7. Question: A Lake Tahoe Community College instructor is interested in the mean number of days Lake Tahoe Community College math students are absent from class during a quarter. X = number of days a Lake Tahoe Community College math student is absent In this case, X is an example of : 8. Question: A marriage counselor is interested in the proportion of clients she counsels who stay married. Identify the sample: 9. Question: A sample is: 10. Question: Crime-related and demographic statistics for 47 US states were collected from government agencies, including the FBI's Uniform Crime Report. One analysis of this data found a strong connection between education and crime indicating that higher levels of education in a community correspond to higher crime rates. Which of the potential problems with samples discussed below could explain this connection? 11. Question: Round the fraction 7/9 to 4 decimal places. Make sure you put the 0 in front of the decimal. 12. Question: As sample size increases, variability in samples: 13. Question: When collecting your data, you notice that your results are very different from your classmates. What should you do? 14. Question: Which of the following could be a cumulative frequency graph? 15. Question: Forbes magazine published data on the best small firms in 2012. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. The table below shows the ages of the chief executive officers for the first 63 ranked firms. Answer the following questions: What percentage of CEOs are 60 years or older? Round your answer to the nearest tenth. What is the relative frequency of ages under 50? If responding using a decimal, round your answer to the nearest hundredth. What is the cumulative frequency for CEOs younger than 55? Round to a whole number. Do not include a decimal. 16. Question: What measurement scale is used in the following example? Baking temperatures for various main dishes: 350, 400, 325, 250, 300. 17. Question: What measurement scale is used in the following example? High school soccer players classified by their athletic ability: Superior, Average, Above average: 18. Question: What measurement scale is used in the following example? Incomes measured in dollars. 19. Question: What measurement scale is used in the following example? The distance in miles to the closest grocery store 20. Question: What measurement scale is used in the following example? The distance in miles to the closest grocery store