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If Q1 = 10 and Q3 = 30, find the Quartile Deviation.
A student scored 60, 70, and 80 in three tests. What score does he need in the fourth test to have a mean of 75?
If the mean of 5 observations is 15 and the mean of 10 other observations is 20, the combined mean is:
In a data set of 10 students' marks: 40, 45, 50, 50, 60, 65, 70, 75, 80, 85, what is the range of the marks?
If the total number of items in a frequency distribution is 50, what is the position of the median?
In a pie chart, a category represents 25% of the total data. What is the central angle of its sector?
Which of the following values is the mode of the data: 5, 8, 5, 12, 15, 8, 8, 20?
In a bar diagram, if the height of a bar representing 'Apples' is 15 units and the scale is 1 unit = 5 kg, how many kg of apples are there?
Find the arithmetic mean of the first five odd natural numbers.
In a cumulative frequency table, if the less-than cumulative frequency for the class 20-30 is 45 and for 30-40 is 60, what is the frequency of the class 30-40?
If the mean of 6, 7, x, 8, 12 is 9, what is the value of x?
In a pie chart showing expenditures, Education is represented by a sector of 72 degrees. If total expenditure is Rs. 50,000, how much is spent on Education?
What is the lower quartile (Q1) of the following data: 2, 4, 6, 8, 10, 12, 14?
If the median of a dataset is 20 and the mean is 22, what is the approximate mode using the empirical relationship?
Find the median of the following frequency distribution: (X: 10, 20, 30, 40) (f: 3, 5, 8, 4).
A student's average marks in 5 subjects is 60. If the marks in the 6th subject is 90, what is the new average?
In a frequency distribution, if the mid-values are 5, 15, 25, 35, 45, what is the class width?
If every value in a dataset is increased by 5, what happens to the arithmetic mean?
In a histogram, what does the area of each rectangle represent?