Chapter – 3 Organization Of Data
I. Choose the correct answers (each question carries 1 mark).
1) The class midpoint is equal to:
Join Whatsapp Groupa) The average of the upper and lower class limit.
b) The product of upper and lower class limit.
c) The ratio of the upper and lower class limit.
d) None of the above.
2) The frequency distribution of two variables is known as
a) Univariate classification b) Bivariate classification.
c) Multivariate classification d) None of the above
3) Statistical calculations in classified data are based on
a) The actual values of observations. b) The upper class limits.
c) The lower class limits. d) The class midpoints.
4) Under exclusive method,
a) The upper class limit of a class is excluded in the class interval
b) The upper class limit of a class is included in the class interval
c) The lower class limit of a class is excluded in the class interval
d) The lower class limit of a class is included in the class interval
5) Range is the
a) Difference between the largest and the smallest values of a variable
b) Average of the largest and the smallest observation
c) Ratio of the largest to the smallest values of a variable
d) None of the above
II. Fill in the blanks (each question carries 1 mark).
1. Data classified according to geographical areas is called _____________.
2. Classification of data according to characteristics and attributes is called _____________.
3. Two ends of a class are called ___________.
4. ____________is the average of upper and lower limit of a class.
5. In __________ method of classification upper limit of a class is included.
6. Frequency distribution of discrete frequency is called___________.7
III. Answer the following questions in a word / sentence (each question carries 1 mark).
1. What is raw data?
2. What is quantitative classification of data?
3. What do you mean by qualitative classification of data?
4. Give the meaning of class limits?
5. What is univariate frequency distribution?
6. Give the meaning of time series data?
7. What is spatial classification of data?
IV. Answer the following questions in about four sentences (each question carries 2 marks)
1. Mention the types of variable.
2. Differentiate between inclusive and exclusive methods of classification.
3. Mention the types of classification of data.
4. Give the formula to find out midpoint.
5. What is frequency?
V. Answer the following questions in about twelve sentences (each question carries 4 marks)
1. Briefly explain ‘loss of information’ in classified data.
2. Differentiate between continuous and discrete variables.
3. Write a note on Classification of data.
VI. Answer the following in about twenty sentences (each question carries 6 marks)
1. Prepare a tally marking chart for the marks in economics scored by 70 students in an examination. 28,17,15,22,29,21,23,27,18,12,7,2,9,4,1,8,3,10,5,20,16,12,8,4,33,27,21,15,3,36,27,21,15,3,37,16,28,9,2,4,6,32,31,29,18,14,13,15,11,9,7,1,5,37,32,23,24,20,19,25,19,25,19,25,19,20,6,9,30.
2. List the four questions to be addressed while preparing a frequency distribution. Briefly explain any two of them.