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If Σf = 50 and the median is the 25.5th term, what is the size of the population N?
The arithmetic mean of 1, 2, 3, ... n is:
Find the mode of the following distribution: Class: 0-10, 10-20, 20-30; Freq: 5, 12, 8.
If each value in a dataset is multiplied by 3, what happens to the mean?
Calculate the Q3 of the dataset: 5, 10, 15, 20, 25, 30, 35.
In a 'less than' ogive, the cumulative frequency of a class is plotted against:
What is the mean of the first five multiples of 3?
If the mean of a frequency distribution is 25 and Σf = 10, find Σfx.
The point of intersection of 'less than' and 'more than' ogives gives:
If the median of a dataset is 20 and each value is increased by 5, the new median will be:
In a frequency table, the sum of relative frequencies is always:
What is the mean of the first five prime numbers starting from 2?
Given Mean = 20 and Median = 21, find the Mode using empirical formula.
If Σ(x - Mean) is calculated for any dataset, the result is:
Find the missing frequency 'p' if the mean of the data (x: 5, 10, 15; f: 2, p, 3) is 10.5.
For a continuous distribution, the median is 30. The median class is 20-40, frequency of median class is 10, and cumulative frequency before it is 15. Find total frequency N.
If the mean of observations x1, x2, ..., xn is M, what is the mean of (x1/k), (x2/k), ..., (xn/k)?
In a dataset, the mean is 15 and the coefficient of variation is 20%. Find the standard deviation.
If the sum of squares of 10 observations is 250 and their mean is 4, find the variance.