What is relative frequency?
What is relative frequency and how can we find it? To find the relative frequency of a category, divide the frequency of that category by the sum of all frequencies.
We can express the relative frequency with a math formula.
Relative frequency of a category =
The table below is a frequency table of type of smartphone.
Let us find the relative frequency for the categories you see in the able above.
Relative frequency of Android phone = = 0.3
Relative frequency of Window phone = = 0.2
Relative frequency of Iphone = = 0.375
Relative frequency of Iphone = = 0.125
A relative frequency distribution is a table that shows the relative frequency for all categories as shown below.
Notice that the sum of the relative frequencies is always equal to 1.
The percentage of a category is found by multiplying the relative frequency of that category by 100.
Percentage of Android phone = 0.3 × 100 = 30%
Relative frequency of Window phone = 0.2 × = 20%
Relative frequency of Iphone = 0.375 × 100 = 37.5%
Relative frequency of Iphone = 0.125 × 100 = 12.5%
Since, the relative frequency of Window phone is 20%, we can conclude 20% of the people in th sample said that they own a Window phone.
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