How to Find Mean, Median, Mode, and Range from a Line Plot | GED Math

Understanding Line Plots for Data Analysis

• 📊 A line plot visually represents data using dots above a number line, where each dot signifies one data point.
• 💡 The first step is to convert the line plot into a clear data set, listing each value as many times as there are dots above it.

Calculating the Median Age

• 🎯 The median is the middle value in an ordered data set. To find it, systematically eliminate the lowest and highest values until the middle number remains.
• 📌 In this data set, after ordering the ages, the median age was determined to be 22.

Determining the Mode

• 📈 The mode is the value that appears most frequently in the data set.
• ⚡ In this case, the age 21 occurred three times, making it the mode.

Calculating the Mean Age

• 🧠 To find the mean, sum all the values in the data set and divide by the total number of data points.
• 🧮 The sum of all ages was 329, and with 15 data points, the mean age was calculated to be approximately 21.93.

Finding the Range of Ages

• 📏 The range is the difference between the highest and lowest values in the data set.
• 🔢 With the highest age being 26 and the lowest being 18, the range of student ages is 8 years.