Observational units, variables, parameters, and statistics

A gaming website wanted to find out which console its visitors owned.
Which choice best represents the population?

• Visitors to the 3DS section.
• All of the website visitors.
• Visitors to the PS4 section.
• Visitors who are on the website for more than 5 minutes.

A restaurant chain wanted to find out how the customer experience was in a store.
Which choice best represents a statistic?

• The percentage of all customers that reported a positive experience.
• The percentage of customers surveyed that reported a  positive experience.
• All customers.
• A random selection of customers that were surveyed.

A mayor wanted to see if the people in his town thought he was doing a good job.
Which choice best represents a statistic?

• The percentage of all townspeople who believe the mayor is doing a good job.
• The percentage of townspeople surveyed who believe the mayor is doing a good job.
• All townspeople.
• A random selection of 100 townspeople.

A survey company was trying to see if people in a state thought the pollution was too high.
Which choice best represents a parameter?

• All people in the state.
• Percentage of all people in the state who thought the pollution was too high.
• 500 randomly selected residents of the state.
• 71% of the residents surveyed thought the pollution was too high.

A school principal wants to see which subject the 845 students in his school liked best.
Which choice best represents a parameter?

• 700 of the 845 students prefer math.
• 100 of the 120 students surveyed prefer math.
• 845 students
• 120 students surveyed

A musician wanted to see what people who bought his last album thought about the songs.
Which choice best represents a parameter?

• The percentage of all people who bought his last album that thought the songs were good.
• 50 people who bought the musician's last album
• 85% of the 50 people surveyed thought the songs were good.
• All 

A beverage company wanted to see if people in the United States liked their new logo.
Which choice best represents a population?

• A selection of logo artists.
• Every person in the United States.
• A selection of shoppers from different shoppers from different states.
• 3,800 children age 5-15

Determine whether the data are categorical or quantitative.
Drink Sizes at McDonalds (S, M, L)

• Categorical

• Quantitative

Determine whether the data are categorical or quantitative.
Altitude of an airplane

• Categorical

• Quantitative

Determine whether the data are categorical or quantitative.
Flavor of Buffalo Wing (Mild, Medium, Hot...)

• Categorical

• Quantitative