Statistical Questions and Variables

Is this a statistical question?

"What is the most popular store among teenagers in the Turtlecreek Mall?"

• YES

• NO

Which of the following are parameters? Select all that apply.

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

• The total collected at a fundraiser was $5, 281

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

• Ten out of 25 random people surveyed chose "red."

Which of the following represent a statistic? Choose all that apply.

• A biology teacher finds that 56% of students preferred labs to tests when polling 25 randomly selected students.

• A teacher surveys all of his students and finds that 87% enjoy group work.

• Forty randomly selected members of a high school music program were asked to report the number of hours they spend practicing each week.

• A company looks at all of the bags of almonds they produced in a year and finds that the average number of almonds per bag was 18.

Fenyang is comparing rooms at a conference center. Here is some data he collected. This data set contains:

• 4 variables, 2 of which are quantitative

• 4 variables, 3 of which are quantitative

• 3 variables, 2 of which are quantitative

• 3 variables, 3 of which are quantitative

Choose the statistical question:

• What time did you wake up this morning?

• What time do 12th graders wake up each morning during the school week?

If the Hamilton High School freshman class is the sample in a statistical study, which is NOT a possible population for the study?

• the student body of Hamilton High school

• the students in Hamilton High School's district

• The students in Ms. Anderson's science class

• All freshman students in the state

Irene is gathering information about students at a local college. Here is some of the data she collected. This data set contains:

• 3 variables, 1 of which is categorical

• 3 variables, 3 of which is categorical

• 6 variables, 1 of which is categorical

• 6 variables, 3 of which is categorical

Madison recorded weather conditions for some major cities on the same day. Here is some of the data she collected.

This data set contains:

• 4 variables, 1 of which are categorical

• 4 variables 2 of which are categorical

• 3 variables 2 of which are categorical

• 3 variables 1 of which are categorical

Rachael gave a survey to her classmates to learn about their superstitions. Here's some of the data she collected. This data set contains:

• 4 variables, 2 of which are quantitative

• 4 variables, 1 of which are quantitative

• 3 variables, 2 of which are quantitative

• 3 variables, 1 of which are quantitative

Which graph best shows a positive correlation between the number of hours studied and the test scores?

• Graph A

• Graph B

• Graph C

• Graph D