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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Calculate the mean of the following grouped data: Class intervals (10-20, 20-30), Frequencies (4, 6).
💡 Hint: Find the class marks and use \\( x = \\frac{\\sum f_i x_i}{\\sum f_i} \\).
Question 2
Easy
Identify the class mark for the interval 25-35.
💡 Hint: Average of lower and upper limits.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the formula for calculating the mean using the Direct Method?
💡 Hint: Recall the parameters represented in the formula.
Question 2
True or False: The Direct Method can lead to an approximate mean.
- True
- False
💡 Hint: Think about what approximations imply.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If you have the following marks data grouped into ranges 0-10, 10-20, with frequencies of 5, 15, calculate the mean and explain how the grouping affects the accuracy.
💡 Hint: Set up the calculations precisely with observations.
Question 2
Using a frequency distribution, calculate the mean of frequencies 2, 3, 5, 7 across intervals 0-10, 10-20, 20-30 and reflect on the methods used.
💡 Hint: Ensure you tally the products methodically.
Challenge and get performance evaluation