Mathematics
In the formula : x̄ = a + for finding the mean of the grouped data, di's are deviations from a (assumed mean) of
lower limits of the classes
upper limits of the classes
mid-points of the classes
frequencies of the classes
Measures of Central Tendency
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Answer
In the formula : x̄ = a + for finding the mean of the grouped data, di's are deviations from a (assumed mean) of mid-points of the classes.
Hence, Option 3 is the correct option.
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Related Questions
If the classes of a frequency distribution are 1 - 10, 11 - 20, 21 - 30, ….., 61 - 70, then the upper limit of the class 11 - 20 is
20
21
19.5
20.5
In a grouped frequency distribution, the mid-values of the classes are used to measure which of the following central tendency?
median
mode
mean
all of these
Construction of a cumulative frequency distribution table is useful in determining the
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mode
all the three measures
The median class for the given distribution is:
Class Interval Frequency 0 - 10 2 10 - 20 4 20 - 30 3 30 - 40 5 0 - 10
10 - 20
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