Interquartile Range and Box Plots

The video tutorial explains how to find the interquartile range from a dot plot. It begins by identifying the median of the data set, followed by determining the upper and lower quartiles. The interquartile range is calculated by subtracting the lower quartile from the upper quartile. The tutorial also demonstrates how this information can be represented in a box plot, emphasizing that the interquartile range is the length of the box.

What does each dot in the dot plot represent?

• The total number of goals in a season

• A game played by the team

• The average score of the team

• A player's performance

Why is it suggested to write out the data set from the dot plot?

• To identify the highest score

• To avoid confusion when finding the median

• To calculate the average score

• To make it easier to visualize the data

What is the first step in finding the median of a dot plot?

• Cross off high and low values

• Identify the mode

• Calculate the average

• Sum all the values

How do you determine the lower quartile of a data set?

• By finding the median of the entire data set

• By identifying the lowest value

• By calculating the average of all values

• By finding the median of the lower half of the data

What should you do with the median when finding quartiles?

• Only include it in the upper half

• Exclude it from both halves

• Include it in both halves

• Only include it in the lower half

What is the upper quartile in the given example?

• 3

• 4

• 5

• 6

How is the interquartile range calculated?

• By adding the upper and lower quartiles

• By subtracting the lower quartile from the upper quartile

• By dividing the upper quartile by the lower quartile

• By multiplying the upper and lower quartiles

What is the interquartile range in the example provided?

• 3

• 1

• 2

• 4

What does the interquartile range represent in a box plot?

• The height of the box

• The total number of data points

• The length of the box

• The width of the box

How many units long is the box in the box plot example?

• 1 unit

• 4 units

• 2 units

• 3 units