Intro to Data and Statistics

A statistical question is a question that can only be answered by using data and where we expect the data to have variability.

• True

• False

Is the following question an example of a statistical or non-statistical question?

How many days are in a week?

• statistical question

• non-statistical question

Answer explanation

A non-statistical question has a definite answer and does not have any variability.

Select all of the questions that result in categorical data.

• What is the average height of the players on the team?

• What color hair does each person in your family have?

• Which country would each person in the class most like to visit?

• How many marbles are in the jar?

• How does each person in your class get to school?

Which of the following descriptions best describes the following question?

On average, how many books does each person in the United States read each year?

• statistical question requiring numerical data to answer it

• statistical question requiring categorical data to answer it

• non-statistical question

Answer explanation

The data will be numbers and will have some variability.

Which values are part of the 5 number summary?

• Minimum, Mean, Median, Mode, Maximum

• Minimum, MAD, Median, Standard Deviation, Maximum

• Minimum, First Quartile, Mean, Third Quartile, Maximum

• Minimum, First Quartile, Median, Third Quartile, Maximum

A landscaper recorded the number of bushes in the yards for houses in a neighborhood and created this visual representation. Did the landscaper display the data in a box plot, dot plot, or histogram?

• box plot

• dot plot

• histogram

Based on the box plot, which statement is true?

• The maximum shoe size is 4.

• The minimum shoe size is 9.

• The middle 50% of the data is between 4 and 9.

• The median shoe size is 7.

How many people read at least 200 pages but less than 400?

• 13

• 4

• 10

• 15

• 20

Based on the histogram, what is the mode pH level?

• 7

• 7.5

• between 7 and 7.5

• between 7.5 and 8.5

• between 6.5 and 7

The dot plot displays the number of letters received in the mail on Friday for houses on the same street. What is the median?

• 2

• 3

• 4

• 5

• 6