For making frequency distribution, the number of classes used depends upon:
size of class
For a frequency distribution, the relationship is:
\[\text{Number of classes} \approx \dfrac{\text{Range of data}}{\text{Size of class}}\]
With the data range fixed, the number of classes is determined directly by the chosen class width — a smaller class size produces more classes, a larger class size produces fewer. Hence the number of classes used depends upon the size of the class.
Similar Questions
Following histogram shows certain frequency distribution against class intervals.
The approximated mean of this distribution is:
The annual vehicles production (in lacs) in india is given in the pie chart.
If the annual production of motor cycle is 1.80 lacs, the annual production of Bicycle is
For determination of mode and median graphically, one considers:
The curve obtained by joining the points, whose x-coordinates are the upper limits of the class interval and y-coordinates are corresponding cumulative frequencies is called:
Which statement of the following is incorrect?
The variation among the observations of each specific class is known as:
Mutual and unique variances among multiple factors can be embodied in a diagram that comprises overlapping circles. The diagram is known as:
The graphical representation of the time series is known as:
Which of the following is a method of collection of primary data?
For a frequency distribution of a discrete variable, the diagram of less than type cumulative frequency is a
Important Questions from Classification of Data
The class marks in a frequency table are given to be 5, 10, 15, 20, 25, 30, 35, 40, 45, 50. The class limits of the first five classes are
In a test in Mathematics, 20% of the students obtained “first class”. If the data are represented by a Pie-Chart, what is the central angle corresponding to “first class”?
The following table gives the monthly expenditure of two families:
Expenditure (in Rs.)
Items
Family A
Family B
Food
3,500
2,700
Clothing
500
800
Rent
1,500
1,000
Education
2,000
1,800
Miscellaneous
2,500
1,800
In constructing a pie diagram to the above data, the radii of the circles are to be chosen by which one of the following ratios?
In an examination, 40% of candidates got second class. When the data are represented by a pie chart, what is the angle corresponding to second class?
Following histogram shows certain frequency distribution against class intervals.
The approximated mean of this distribution is:
