Aggregating Grades: Calculating Class Averages
When working with student data, you often need to summarize information to gain insights into class performance. Aggregating data means combining individual data points—such as student grades—so you can calculate overall statistics like the class average. Calculating averages helps you quickly see how the class is doing as a whole and identify trends that might require your attention.
123456789101112131415# Dictionary of student names and their grades grades = { "Alice": 88, "Bob": 76, "Carlos": 91, "Dina": 85, "Eli": 79 } # Extract just the grades into a list grade_values = list(grades.values()) # Calculate the average grade average = sum(grade_values) / len(grade_values) print("Class average:", average)
To aggregate data for calculating an average, start by collecting all the grades from your data structure—in this case, extracting values from a dictionary. Next, use the sum function to add up all the grades, and then divide by the number of students using len. This process gives you the mean score, a single number that summarizes class performance. For teachers, knowing the average helps you spot if the class is struggling or excelling overall and supports data-driven decisions for future lessons.
12345# Using built-in functions to find the highest and lowest grades highest = max(grade_values) lowest = min(grade_values) print("Highest grade:", highest) print("Lowest grade:", lowest)
1. Which function can be used to calculate the sum of a list of numbers in Python?
2. Why is it important to calculate the average grade for a class?
3. How can you find the highest grade in a list of grades?
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When working with student data, you often need to summarize information to gain insights into class performance. Aggregating data means combining individual data points—such as student grades—so you can calculate overall statistics like the class average. Calculating averages helps you quickly see how the class is doing as a whole and identify trends that might require your attention.
123456789101112131415# Dictionary of student names and their grades grades = { "Alice": 88, "Bob": 76, "Carlos": 91, "Dina": 85, "Eli": 79 } # Extract just the grades into a list grade_values = list(grades.values()) # Calculate the average grade average = sum(grade_values) / len(grade_values) print("Class average:", average)
To aggregate data for calculating an average, start by collecting all the grades from your data structure—in this case, extracting values from a dictionary. Next, use the sum function to add up all the grades, and then divide by the number of students using len. This process gives you the mean score, a single number that summarizes class performance. For teachers, knowing the average helps you spot if the class is struggling or excelling overall and supports data-driven decisions for future lessons.
12345# Using built-in functions to find the highest and lowest grades highest = max(grade_values) lowest = min(grade_values) print("Highest grade:", highest) print("Lowest grade:", lowest)
1. Which function can be used to calculate the sum of a list of numbers in Python?
2. Why is it important to calculate the average grade for a class?
3. How can you find the highest grade in a list of grades?
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