Alg. 2 Final Exam Review Pt. 2 (24-25)

For the survey question below, is the variable quantitative or categorical?

"How many hours a week do you watch TV?"

• Categorical

• Quantitative

Which of the following is a parameter?

• 75% of the students at North High School voted for Lucy. 

• The total collected at a fund-raiser was $5,281.

• The mean height of students at one table in the cafeteria is 1.3 m.

• Ten out of 25 people surveyed chose “red.”

Which of the following is an example of an experiment?

• Twenty people in a neighborhood are asked if they want more streetlights 
  on the street.

• More streetlights are installed on one street and people are then asked if 
  they like the change.

• The number of accidents on the street is compared to last year’s rate.

• People are asked to call a number to comment about the need for new 
  streetlights. 

From a population of 1,600 cars, a sample of 25 is chosen. The dealer calculates the mean weight of those 25 cars. Tell whether this mean weight is an example of a statistic or a parameter.

• Statistic

• Parameter

Which of the following is an example of an experiment?

• Twenty people in a class are asked if they want quizzes or tests.

• One class is given quizzes and the other is given tests, then students are then asked to rate their satisfaction with the class.

• The number of tests in a class is compared to last year’s rate.

• Students are asked to submit an online survey about whether quizzes or tests are better.

Choose one of the following sampling methods to describe the 
example: cluster, convenience, systematic, self-selected.

The first ten people who show up for class are asked to fill out a form.

• cluster

• convenience

• systematic

• self-selected

Choose one of the following sampling methods to describe the 
example: cluster, convenience, systematic, self-selected.

All of the students in 3 randomly selected classrooms are given a survey.

• cluster

• convenience

• systematic

• self-selected

Choose one of the following sampling methods to describe the 
example: cluster, convenience, systematic, self-selected.

Students with lunch numbers that end in 2 or 7 are given a survey.

• cluster

• convenience

• systematic

• self-selected

Which of the following sampling methods would bias the set of responses? 
Select all that apply.

• asking people to return a mail-in card

• posting a voluntary survey online

• interviewing people on Monday morning

• interviewing pet owners about their pet’s health

For skewed data, which option should you use to describe the data?

• mean and standard deviation

• median and interquartile range