Frequency in Ungrouped vs Grouped Data
Which of the following is the CORRECT understanding of 'Frequency' in the context of raw (ungrouped) data?
- Frequency = the number of classes in the distribution
- Frequency of an observation = how many times that observation occurs in the raw data — Correct Answer
- Frequency = the class mark of a class
- Frequency = the range of the data
Explanation:
Correct Answer Explanation
In raw data, frequency of an observation = how many times that observation occurs in the raw data.
Examples from Marks Data (Table 3.1):
- Value 40: appears 3 times (frequency = 3)
- Value 0: appears 1 time (frequency = 1)
- Value 10: appears 1 time (frequency = 1)
- Value 49: appears 5 times (frequency = 5)
In Grouped Data:
Class Frequency = number of observations falling in a class interval (found by tally marking).
📚 About this Topic — CH-3: Organisation of Data
This multiple choice question is from CH-3: Organisation of Data, NCERT Books, Statistics for Economics. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from CH-3: Organisation of Data to strengthen your preparation.
