Question

For each of the following, state whether the quantity described is a parameter or a statistic,...

For each of the following, state whether the quantity described is a parameter or a statistic, and give the correct notation.

  1. The proportion of students at your university that smoke, based on data from your class.
  2. The mean commute time for employees at a small company, based on interviews with all employees.
  3. The average gas price in Minnesota, based on prices at randomly selected gas stations throughout the state.
  4. The difference in proportion who have ever smoked cigarettes, between a sample of 500 people who are 60 years old and a sample of 200 people who are 25 years old.
  5. The correlation between price of a textbook and the number of pages, based on 25 textbooks selected from the bookstore.
Math   Statistics-And-Probability   
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Answer #1

The proportion of students at your university that smoke, based on data from your class.

Statistic, p

The mean commute time for employees at a small company, based on interviews with all employees.

Statistic, xbar

The average gas price in Minnesota, based on prices at randomly selected gas stations throughout the state.

Parameter, mu

The difference in proportion who have ever smoked cigarettes, between a sample of 500 people who are 60 years old and a sample of 200 people who are 25 years old.

Statistic, p1 - p2

The correlation between price of a textbook and the number of pages, based on 25 textbooks selected from the bookstore.

Statistic, ρ

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