Class Intervals and Data Analysis

The video tutorial explains how to construct a frequency distribution table using grades of 60 students. It covers five steps: finding the range, deciding the number of classes, calculating class width, writing class intervals, and tallying data to count frequencies. The tutorial also explains how to calculate class boundaries and marks, providing a comprehensive guide to organizing and analyzing data effectively.

What is the first step in constructing a frequency distribution table?

• Writing class intervals

• Finding the class width

• Determining the number of classes

• Finding the range

What is the total number of students' grades used in this frequency distribution table?

• 50

• 55

• 60

• 65

How is the range of a data set calculated?

• Highest number minus lowest number

• Average of all numbers

• Sum of all numbers

• Lowest number minus highest number

What is the highest grade in the data set?

• 95

• 98

• 96

• 97

What is the lowest grade in the data set?

• 70

• 69

• 71

• 68

What is the range of the data set?

• 27

• 26

• 25

• 28

In this scenario, how many classes are predetermined for the frequency distribution table?

• 6

• 5

• 7

• 4

What is the formula for calculating class width?

• Range divided by number of classes

• Number of classes divided by range

• Difference between range and number of classes

• Sum of range and number of classes

Why is it important to round up the class width to the nearest whole number?

• To ensure all data points are included

• To make calculations easier

• To avoid decimal points

• To match the number of classes

What is the class width used in this frequency distribution table?

• 4

• 7

• 5

• 6