Practice Mean Of Grouped Data (13.2) - Statistics - CBSE 10 Mathematics

Practice: Mean of Grouped Data

Lesson 13.2Statistics

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9 questions

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6 sample questions

Question 1.
Using the direct method, calculate the mean based on the following data: marks obtained (10, 15, 20) with frequencies (2, 3, 5).
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Multiply marks by frequencies first.
Question 2.
Identify the cumulative frequency for the first two class intervals given frequencies (4, 6).
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Add the frequencies cumulatively.
3Question 3.
What is the formula for calculating mean using the Direct Method?
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Remember to sum products of classes.
4Question 4.
True or False: The Assumed Mean Method requires knowing exact data values.
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Think about how we make estimates.
Question 5.
A company collected data from 200 employees regarding their monthly salary ranges. Formulate a grouped frequency table, calculate the mean salary using all three methods, and compare their differences.
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Begin by organizing the data into intervals.
Question 6.
In an educational study, analyze exam scores of a whole class of students. Calculate the mean using Direct and Assumed Mean Method, then discuss which best represents the data variation.
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Review which scores were most common in your calculations.

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