Relative Frequency and Cumulative Frequency Concepts

The video tutorial explains how to find the relative frequency, cumulative frequency, and midpoint of a frequency table. It begins with definitions of each term, followed by detailed steps to calculate relative frequency using class frequencies and total frequency. The tutorial then covers cumulative frequency calculation by summing class frequencies. Finally, it demonstrates how to find midpoints by averaging class limits, highlighting their role in statistical calculations like mean and standard deviation.

What is the relative frequency in a frequency table?

• The midpoint of each class

• The difference between the highest and lowest frequency

• The sum of all frequencies

• The percentage or proportion for each class

How do you calculate the total frequency in a frequency table?

• By multiplying all frequencies

• By adding all frequencies

• By subtracting the smallest frequency from the largest

• By adding all the midpoints

What is the relative frequency of a class with a frequency of 6 in a table with a total frequency of 30?

• 10%

• 20%

• 30%

• 40%

What is the cumulative frequency?

• The average frequency of all classes

• The frequency of the last class

• The difference between the first and last frequency

• The sum of all frequencies up to a certain class

How do you start calculating cumulative frequency?

• By adding the first frequency to the next

• By multiplying all frequencies

• By subtracting the first frequency from the last

• By dividing the total frequency by the number of classes

What is the midpoint in a frequency table?

• The average of all frequencies

• The sum of the lower and upper limits divided by two

• The difference between the highest and lowest frequency

• The total frequency divided by the number of classes

How do you calculate the midpoint for a class with limits 1 and 5?

• Multiply 1 and 5, then divide by 2

• Add 1 and 5, then multiply by 2

• Add 1 and 5, then divide by 2

• Subtract 1 from 5, then divide by 2

What is the width in a frequency table?

• The total frequency divided by the number of classes

• The difference between the lower and upper limits of a class

• The difference between the highest and lowest frequency

• The sum of all midpoints

How can you find the midpoint without using the width?

• By dividing the total frequency by the number of classes

• By multiplying the lower and upper limits

• By subtracting the lower limit from the upper limit

• By adding the lower and upper limits and dividing by 2