Box-and-Whisker Plot Concepts

The video tutorial introduces box-and-whisker plots, explaining their components and significance. It provides examples using student assignment data and phone plan selection to demonstrate how to construct and interpret these plots. The tutorial concludes with a guided instruction on creating a box-and-whisker plot from test scores and provides assignment instructions.

What is the primary purpose of a box-and-whisker plot?

• To calculate the average of a data set

• To compare two different data sets

• To show the distribution of a data set

• To display the frequency of data points

In a box-and-whisker plot, what does the line inside the box represent?

• The minimum value

• The maximum value

• The median

• The mean

What is the interquartile range (IQR) in a box-and-whisker plot?

• The range between the minimum and maximum values

• The range between the lower and upper quartiles

• The range between the median and the minimum value

• The range between the median and the maximum value

Which part of the box-and-whisker plot represents the middle 50% of the data?

• The median line

• The box

• The entire plot

• The whiskers

In the example of choosing a phone plan, what was the median number of texts sent per day?

• 50

• 20

• 10

• 0

What is the significance of the whiskers in a box-and-whisker plot?

• They display the most frequent values

• They represent the average values

• They indicate the minimum and maximum values

• They show the range of the middle 50% of data

In the guided instruction example, what was the median test score?

• 98

• 80

• 70

• 88

How do you find the median in a set of data?

• By averaging all the numbers

• By counting the frequency of each number

• By finding the middle number in an ordered list

• By subtracting the smallest number from the largest

What is the lower quartile in a box-and-whisker plot?

• The median of the entire data set

• The largest value in the data set

• The smallest value in the data set

• The median of the lower half of the data

In the test score example, what was the upper quartile?

• 92

• 98

• 80

• 88