Homework 1

Sign Up for RStudio Cloud

If you have not already, use the instructions in my introductory email to sign up for RStudio Cloud and join the Space for this course.

Problems

Complete each of the following problems. Submit your solutions — stapled — at the beginning of class on Monday.

Problem 1: For each of the following statistical queries, determine whether the collection of items described is the population, a sample from the population, or neither.

  1. How many active professional American football players suffer from chronic traumatic encephalopathy?
    1. Current members of the New York Giants
    2. All active players in the NFL
    3. The players for each team in the National Football Conference
    4. Players who volunteer to get an MRI of their brains
  2. What is the average difference between the salary of a male and female reporting their salaries to the IRS?
    1. All workers in the US
    2. All males and females reporting their income to the IRS
    3. Male and female workers at Google
    4. Male and female workers interviewed by Gallup

Problem 2: For each of the previous two statistical queries, determine the relevant parameter of the population, and a potentially useful statistic of a sample from that population.

Problem 3: For each of the following measurements, determine whether the measurement is quantitative or qualitative, and if quantitative, whether it is discrete or continuous.

  1. The number of current citizens of the United States.
  2. The amount of time it takes to complete this assignment.
  3. The brand of a razor.
  4. The lifespan of an individual born in the 1980s.
  5. Your favorite color.