Understanding Stem-and-Leaf Plots

The video tutorial covers the concept of stem-and-leaf plots, explaining how they organize data by splitting each value into a stem and a leaf. It provides a detailed example of creating a stem-and-leaf plot using a data set of cell phone call lengths. The tutorial includes a practice exercise for students to work through independently and concludes with an analysis of a stem-and-leaf plot to answer questions about data distribution and test scores.

What is the primary purpose of a stem-and-leaf plot?

• To calculate the average of a dataset

• To organize data using digits

• To display data in a pie chart

• To find the median of a dataset

In a stem-and-leaf plot, what does the 'stem' represent?

• The total number of data points

• The ones digit of the data values

• The tens digit of the data values

• The average of the data values

When creating a stem-and-leaf plot, what should you do if a number appears more than once in the dataset?

• Write it down as many times as it appears

• Write it down only once

• Ignore the repeated number

• Highlight it in a different color

What is the stem for the number 23 in a stem-and-leaf plot?

• 0

• 23

• 3

• 2

How do you represent the number 55 in a stem-and-leaf plot?

• 5 | 0

• 55 | 0

• 0 | 55

• 5 | 5

Why is it important to create a key for a stem-and-leaf plot?

• To add color to the plot

• To explain the meaning of the stems and leaves

• To calculate the total number of data points

• To find the mode of the dataset

In a stem-and-leaf plot, what does the 'leaf' represent?

• The average of the data values

• The total number of data points

• The ones digit of the data values

• The tens digit of the data values

How many students scored less than 80 points according to the stem-and-leaf plot?

• Three students

• Four students

• Five students

• Six students

How many students scored at least 90 points?

• Four students

• Two students

• Three students

• Five students

Where is most of the data concentrated in the students' test scores?

• In the 90s

• In the 80s

• In the 70s

• In the 60s