NumericalModerate3 marks
The following table gives the duration of movies in minutes. Using step–deviation method, find the mean duration of the movies.
Topic: Mean / median / mode / quartiles
Previous-year question practice database
Answer
Exam answer
Mean duration ≈ 127.4 minutes.
Explanation
Use step-deviation: x̄=A+h(Σfu/Σf), using the class marks, assumed mean and class width from the supplied table.
More from Measure of Central Tendency (Mean, Median, Quartiles and Mode)
Rakhi’s mobile number has the following integers :
1, 6, 9, 8, 9, 1, 7, 8, 9
The mode of the above given data is :2026Find the mean of the following frequency distribution using step-deviation method.
Take assumed mean = 282026Assertion (A): The mean of first 9 natural numbers is 4.5.
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