I have Learnt
A table consisting of values of a data along with their frequencies is called a frequency table. In a group data, the table consisting of class intervals and their respective frequencies is called frequency table or a frequency distribution. The representation of data by a polygon in which class marks are plotted along x-axis and frequencies along y-axis is called a frequency polygon. In a group data, number of values less than or within the limits of a class is called cumulative frequency of the respective class. A polygon made by joining the points whose x-coordinates are class marks and y-coordinates are their cumulative frequencies is called a cumulative frequency polygon.
1. Encircle the correct option in the following.
Which of the following is not measure of dispersion?
- (a) variance
- (b) standard deviation
- (c) range
- (d) arithmetic mean
What is median of the data 4, 3, 0, 2, 1?
- (a) 0
- (b) 2
- (c) 3
- (d) 4
Which of the following is measure of dispersion?
- (a) arithmetic mean
- (b) range
- (c) quartile
- (d) median
Which of the following is used to compare the consistency of two data?
- (a) arithmetic mean
- (b) standard deviation
- (c) C.V.
- (d) G.M.
What is sum of deviations taken from arithmetic mean?
- (a)
- (b)
- (c) n
- (d) 0
What is variance of five values 4, 4, 4, 4, 4?
- (a) does not exist
- (b) 4
- (c) 5
- (d) 0
Which of the following divides the data into four equal parts?
- (a) decile
- (b) quartile
- (c) percentile
- (d) median
Which of the following divides the data into ten equal parts?
- (a) decile
- (b) quartile
- (c) percentile
- (d) median
Which of the following divides the data into two equal parts?
- (a) decile
- (b) quartile
- (c) percentile
- (d) median
Which of the following divides the data into hundred equal parts?
- (a) decile
- (b) quartile
- (c) percentile
- (d) median