Understanding Relative Frequencies

The video tutorial explains how to calculate relative frequencies as percentages using a frequency table. It begins by defining a frequency table and the concept of relative frequency. The tutorial then demonstrates how to calculate the total number of students and determine the relative frequency for different age intervals. Each calculation is shown step-by-step, converting frequencies into decimals and percentages. The video concludes with a summary of the calculations for each age group.

What is a frequency table used for?

• To determine the median of a dataset

• To calculate the average of a dataset

• To find the mode of a dataset

• To list possible values of a variable and their frequencies

What is the first step in calculating relative frequency?

• Summing the frequencies to get the total number of observations

• Finding the mode of the dataset

• Identifying the median of the dataset

• Calculating the average of the dataset

How is the relative frequency expressed?

• As a logarithm

• As a ratio

• As a percentage, fraction, or decimal

• As a whole number

What is the relative frequency of students aged 19 through 22?

• 25.6%

• 7.7%

• 20.5%

• 5.1%

What is the relative frequency of students aged 23 through 26?

• 20.5%

• 15.4%

• 5.1%

• 25.6%

What is the relative frequency of students aged 27 through 30?

• 7.7%

• 5.1%

• 15.4%

• 25.6%

What is the relative frequency of students aged 31 through 34?

• 25.6%

• 15.4%

• 5.1%

• 20.5%

What is the relative frequency of students aged 35 through 38?

• 25.6%

• 15.4%

• 20.5%

• 7.7%

How do you convert a fraction to a percentage?

• Multiply by 100 and add a percentage sign

• Divide by 100 and add a percentage sign

• Multiply by 10 and add a percentage sign

• Divide by 10 and add a percentage sign

What is the total number of students in the dataset?

• 39

• 45

• 25

• 31