The average American consumes 86 liters of alcohol per year. Does the average college student consume more alcohol per year?

A researcher surveyed 14 randomly selected college students and found that they averaged 88.6 liters of alcohol consumed per year with a standard deviation of 21 liters.

A. Identify thepopulation(s).

• All the Americans.
• All individuals who consume alcohol.
• All the college students.
• Average number of Americans who consume alcohol.

B. What is thevariablebeing examined for individuals in the population(s)?

• Average number of Americans who consume alcohol.
• Amount of alcohol sold per year.
• Amount of alcohol consumed by each person per year.
• Whether or not a person consumes alcohol.

C. Is thevariable categorical or quantitative?

• Categorical
• Quantitative

D. Identify theparameter(s).

• Whether or not a person consumes alcohol.
• all individuals who consume alcohol.
• The proportion of those who consume alcohol.
• The mean amount of alcohol consumed by each person per year.

2/ According to Facebook's self-reported statistics, the average Facebook user has 130 Facebook friends. For a statistics project a student at Contra Costa College tests the hypothesis that CCC students will average more than 130 Facebook friends.

She randomly selects 3 classes from the schedule of classes and distributes a survey in these classes. Her sample contains 45 students.

Here are the null and alternative hypotheses for her study: H₀: = 130, H_a: > 130.

What does represent in these hypotheses?

• mean number of Facebook friends for the average user
• mean number of Facebook friends for the CCC students in her sample
• mean number of Facebook friends for CCC students