The data which can take only whole number values is called continuous data.
True
False
When the class intervals are so arranged that the upper limit of one class is the lower limit of the next class, it is called exclusive or continuous class interval.
True
False
Raw data is already arranged in a meaningful format.
True
False
There are two types of class intervals—discrete and continuous.
True
False
A bar graph is a graphical representation of numerical data in the form of rectangles (or bars) of equal width and varying heights.
True
False
If the fifth class interval is 60–65 and the fourth class interval is 55–60, then the first class interval is 45–50.
True
False
The difference between the greatest and the smallest values in the set of observations is called the range.
True
False
The total of all frequencies should be equal to the total number of observations.
True
False
Click the correct answer.
What is the number of times an observation occurs in a data is called?
Range
Frequency
Class size
None of these
What is the class marks of an interval?
Width of the class interval
Class size
Mid-value of the class interval
Class limit
What is the range of the data 6, 12, 9, 15, 8, 5, 14, 7, 6 and 3?
13
10
11
12
What is the other name for the inclusive class intervals?
Discontinuous class intervals
Continuous class intervals
Unequal class intervals
Higher class intervals
What should be done to convert 1–5, 7–11, 13–17, ... into exclusive class intervals?
Add 0.5 to the upper limit and subtract 0.5 from the lower limit
Add 1 to the lower limit and subtract 1 from the upper limit
Add 0.5 to the lower limit and subtract 0.5 from the upper limit
Add 1 to the upper limit and subtract 1 from the lower limit
Which of the following depends on the numerical value of the data represented in a bar graph?
Height of the rectangle
Breadth of the rectangle
Area of the rectangle
All of these
In a frequency distribution with classes 0–10, 10–20, etc., the size of the class intervals is 10. What will be the lower limit of the fourth class?
40
50
20
30
What is the range of the data 9, 11, 12, 6, 13, 15, 4, 17 and 3?
17
14
9
3
Click the correct answer.
To avoid errors in counting a large number of observations, vertical bars or lines called
are used to help to mark the frequencies.
tally marks
range
bar marks
The data tabulated in the
class interval style needs to be re-adjusted to exclusive class interval style for easy comprehension and uniform class intervals.
inclusive
continuous
distribution
The first class interval of any grouped frequency distribution contains the
value and the last class interval contains the maximum value of the data.
minimum
middle
most occuring
In a bar graph, bars are drawn either
or horizontally keeping equal space between them.
vertically
perpendicularly
uniquely
When the number of observations is large, the observations are usually organised in groups of equal width called
.
class intervals
class size
class marks
The difference between the greatest and the smallest values in the set of observations is called
.
range
frequency
tally marks
The data which can take any value, i.e., whole numbers or fractional numbers is called
.
continuous data
discrete data
range
The data which can take only whole number values is called
.
