8.1- 8.4 quiz

Which of the following is a statistical question

• How old am I?

• How old are the students in the school?

• How many times did you eat lunch this month?

• How many presidents were under 50 when inaugurated?

Answer explanation

How old are the students in the school allows for variability. There are many ages and many people in each age.

A statistical question is a question that can be answered by collecting data and has ________

Is this a statistical question?

How tall was Marco on his last birthday?

• yes

• no

Answer explanation

The answer is just Marco’s height on his last birthday so there is no variability in the data.

Is this a statistical question?

How tall are the students in your class, in centimeters?

• yes

• no

Answer explanation

The students in my class are not all the same height so there would be variability in the data.

Choose the statistical question from the options below.

• What is the speed of light?

• How many pages does the longest book in your library have?

• What is the average amount of time students spend on social media each day?

• Who was the first person to climb Mount Everest?

Which of the following is a statistical question?

• What is the height of the tallest building in the world?

• How tall is the tallest building in your city?

• What is the average height of buildings in major cities around the world?

• What color is the Empire State Building?

Is this a statistical question?

How do the heights of the sixth graders in your school compare with the heights of sixth graders in a school in another country?

• yes

• no

Answer explanation

To answer this question, you would need to know the heights of all sixth graders in the school and the heights of all sixth graders in a school in another country, so there would be variability in the data.

Write your own statistical question

adding up all the data points and

dividing the sum by the number of data points

(or total number of numbers).

• mean

• median

• mode

• range

the middle value (or midpoint)

after all the data points have been arranged in

value order as a list of numbers.

• mean

• median

• mode

• range