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Organisation Of Data - Class 11 Commerce Economics - Extra Questions

Define arrayed data.



Distinguish between raw data and arrayed data.



Fill in the blanks:
Data obtained in the ............... form is called raw data.



Complete the following cumulative frequency table:
ClassFrequencyLess than type frequency
0-102
10-2012
20-3020
30-4016
Total50



For the following raw data, form a discrete frequency distribution:
30,32,32,28,34,34,32,30,30,32,32,34,30,32,32,28,32,30,28,30,32,32,30,28 and 30



The marks scored by 55 students in a test are given below.
Marks :0 - 55 - 1010 - 1515 - 20 20 - 25 25  - 30 30 - 25
No. of students 2613171142
Prepare a cumulative frequency table.



Given below are the cumulative frequencies showing the weights of 685 students of a school. Prepare a frequency distribution table.
Weight (in kg )No. of students 
Below 25  0
Below 3024
Below 3578
Below 40183
Below 45294
Below 50408
Below 55543
Below 60621
Below 65674
Below 70685



The numbers of members in the 40 families in Bhilar are as follows: 1, 6, 5, 4, 3, 2, 7, 2, 3, 4, 5, 6, 4, 6, 2, 3, 2, 1, 4, 5, 6, 7, 3,
4, 5, 2, 4, 3, 2, 3, 5, 5, 4, 6, 2, 3, 5, 6, 4, 2. Prepare a frequency table and find the mean of members of 40 families. 



Explain the meaning of the following terms: true class limits.



Following are the ages of 360 patients getting medical treatment in a hospital on a day :
Age (in years ) :10 - 2020 - 3030 - 4040 - 50 50 - 60 60 - 70
No. of Patients :905060805030
Construct a cumulative frequency distribution. 



What is the class mark of the interval 2732? 



Following data gives height in cm(X) and weight in kgs(Y) of 20 boys. Prepare a bivariate frequency table taking class intervals 150154, 155159 etc., for X and 3539, 4044 etc., Y. Also find conditional frequency distribution of Y when 155X159
(152,40) (160,54) (163,52) (150,35)
(154,36) (160,49) (166,54) (157,38)
(159,43) (153,48) (152,41) (158,51)
(155,44) (156,47) (156,43) (166,53)
(160,50) (151,39) (153,50) (158,46).



Following table gives income(X) and expenditure(Y) of 25 families.
Find how many families have their income Rs. 300 and more and expenses Rs. 400 and less?

1672752_06a6fb328e674a959fa5a2092a2cab41.PNG



Following table gives income(X) and expenditure(Y) of 25 families.
Find marginal frequency distribution of income and expenditure.

1672729_d79072c3759c49cb84592d9e03efd08b.PNG



Following data gives height in cm(X) and weight in kgs(Y) of 20 boys. Prepare a bivariate frequency table taking class intervals 150154, 155159… etc., for X and 3539, 4044… etc., for Y. Also find marginal frequency distributions.

(152,40) (160,54) (163,52) (150,35)
(154,36) (160,49) (166,54) (157,38)
(159,43) (153,48) (152,41) (158,51)
(155,44) (156,47) (156,43) (166,53)
(160,50) (151,39) (153,50) (158,46).



Following table gives income(X) and expenditure(Y) of 25 families.
Find conditional frequency distribution of X when Y is between 300400.

1672730_fdc71613a9ff496c8450f2b0e32aada9.PNG



Following data gives the coded price(x) and demand(y) of a commodity.
Price5798107985111110239
Demand9151315141011141014614151112
Price243146107158656111415
Demand61181110159151391410756
Classify the data by taking classes 04, 59 etc., for x and 58,912 etc., for y. Also find marginal frequency distribution of x and y.



Two dice are thrown simultaneously 25 times. The following pairs of observations are obtained.
(2,3) (2,5) (5,5) (4,5) (6,4) (3,2) (5,2) (4,1) (2,5) (6,1) (3,1) (3,3) (4,3) (4,5) (2,5) (3,4) (2,5) (3,4) (2,5) (4,3) (5,2) (4,5) (4,3) (2,3) (4,1).
Prepare a bivariate frequency distribution table for the given data. Also obtain the marginal distributions.



Following data gives the age of husbands(X) and age of wives(Y) in years. Construct a bivariate frequency distribution table and find the marginal distributions.
X2725282629272826252527
Y2120202123222020191923
X26292527262528252726
Y19232322212022232221
Find conditional frequency distribution of age of husbands when the age of wife is 23 years.



Construct a bivariate frequency distribution table of the marks obtained by students in English(X) and Statistics(Y).
Marks in Statistics(X)37204628352641483223203947332726
Marks in English(Y)30324133294330214438472432312021
Construct a bivariate frequency distribution table for the given data by taking class intervals 2030, 3040, . etc. for both X and Y. Also find the marginal distributions and conditional frequency distribution of Y when X lies between 3040.



Following table gives income(X) and expenditure(Y) of 25 families.
Find conditional frequency distribution of Y when X is between 200300.

1672749_c487e3c5857b4582944ffae677ce8d3b.PNG



Following data gives the age in years and marks obtained by 30 students in an intelligence test.
Age161722192116
Marks161939504841
Age212020232219
Marks594442623767
Age232022222322
Marks455735373856
Age171816211920
Marks546147674956
Age171823212016
Marks514265565248
Prepare a bivariate frequency distribution by taking class intervals 1618, 1820,.... etc., for age and 1020,2030. etc., for marks. Find the marginal frequency distributions.



Following data gives the age in years and marks obtained by 30 students in an intelligence test.
Age161722192116
Marks161939504841
Age212020232219
Marks594442623767
Age232022222322
Marks455735373856
Age171816211920
Marks546147674956
Age171823212016
Marks514265565248
Prepare a bivariate frequency distribution by taking class intervals 1618, 1820,... etc., for age and 1020,2030… etc., for marks. Find conditional frequency distribution of marks obtained when age of students is between 2022.



Find marginal frequency distributions.



Conditional frequency distribution of Sales when the advertisement expenditure is between 6466. (Thousand Rs.)



Following data gives the coded price(x) and demand(y) of a commodity.
Price5798107985111110239
Demand9151315141011141014614151112
Price243146107158656111415
Demand61181110159151391410756
Classify the data by taking classes 04, 59 etc. for x and 58, 912 etc. for y.
Also find conditional frequency distribution of y when x is less than 10.



Prepare a frequency table of the following ages (in years) of 30 students of class VIII in your school:
13,14,13,12,14,13,14,15,13,14,13,14,16,12,14
13,14,15,16,13,14,13,12,17,13,12,13,13,13,14



Following figures relate the weekly wages (in Rs.) of 15 workers in a factory:
300,250,200,250,200,150,350,200,250,200,150,300,150,200,250
Prepare a frequency table.
Which mark is occurring more frequently?



Construct a bivariate frequency distribution table for the given data by taking classes 115125, 125135,... etc., for sales and 6062,6264,... etc., for advertisement expenditure.



Conditional frequency distribution of advertisement expenditure when the sales are between 125135. (lakh Rs.)



Fill in the blanks:
Arranging the numerical figures in ascending or descending order is called an .............



Define the term Raw data



Define the term Array



Define the term:
Array.



Arrange the following as an array (in descending order):
0,2,0,3,4,1,2,3,5



Arrange the following as an array (in ascending order):
6.3,5.9,9.8,12.3,5.6,4.7



Upper clas limit of 2430 is _______



Fill in the blanks:
Lower class limit of 1518 is



A die is thrown 25 times and the scores were as given below:
2,1,4,6,2,3,1,5,6,3,4,5,2,1,6,6,6,3,2,2,2,4,3,2,2
Construct data array.



Arrange the following as an array (in descending order):
9.1.3.7.5.6.8.3.11.5.10.6



Arrange the following as an array (in ascending order):
7,5,15,12,10,11,16



Uses the table given to find:
The upper and lower limits of the fifth class



If the upper limit and the lower limits of a class interval are  16 and  10; the class interval is ____



Upper limit of 512.5 is _____



Find the actual lower class limits, upper class limits and the mid-values of the classes:
1019,2029,3039, and 4049.



Fill in the blanks:
In the class interval 3546; the lower limit is ....... and the upper limit is.....



Data personally collected by an investigator is ____________ data.



Classification data based on the geographical differences of the data is ________.



Define raw data. What is bivariate and univariate distribution? Explain.



The number of books in different shelves of a library are as follows :
30,32,28,24,20,25,38,37,40,45,16,20
19,24,27,30,32,34,35,42,27,28,19,34, 
38,39,42,29,24,27,22,29,31,19,27,25
28,23,24,32,34,18,27,25,37,31,24,23,
43,32,28,31,24,23,26,36,32,29,28,
Prepare a cumulative frequency distribution table using 45 - 49 as the last class-interval.   



Explain the difference between a frequency distribution and a cumulative frequency distribution.



The following cumulative frequency distribution table shows the daily electricity consumption (in kW) of 40 factories in an industrial state : Represent this as a frequency distribution table.
Consumption (in kW)No. of Factories
Below 240  1
Below 270  4
Below 300  8
Below 33024
Below 36033
Below 39038
Below 42040



The marks scored by 40 students of class IX in mathematics are given below:
81,55,68,79,85,43,29,68,54,73,47,35,72,64,95,44,50,77,64,35,79,52,45,54,
70,83,62,64,72,92,84,76,63,43,54,38,73,68,52,54.
Prepare a frequency distribution with class size of 10 marks.



Define the following terms: Frequency distribution



The heights (in cm) of 30 students of class IX are given below:
155,158,154,158,160,148,149,150,153,159,161,148,157,153,157,162,159,151,154,156,
152,156,160,152,147,155,163,155,157,153.
Prepare a frequency distribution table with 160-164 as one of the class intervals.



Define the following terms :
True class limits



The water bills (in RS) of 32 houses in a certain street for the period 1.1.98 to 31.3.98 are given below :56,43,32,38,56,24,68,85,52,47,35,58,63,74,27,84,69,35,44,75,55,30,54,65,
45,67,95,72,43,65,35, 
Tabulate the data and present the data as a cumulative frequency table using 70 - 79 as one of the class intervals.



Following figures relate the weekly wages (in Rs.) of 15 workers in a factory:
300,250,200,250,200,150,350,200,250,200,150,300,150,200,250
Prepare a frequency table.
How many workers are getting the minimum wages?



Following figures relate the weekly wages (in Rs.) of 15 workers in a factory:
300,250,200,250,200,150,350,200,250,200,150,300,150,200,250
Prepare a frequency table.
What is the range in wages (in Rs)?



Following figures relate the weekly wages (in Rs.) of 15 workers in a factory:
300,250,200,250,200,150,350,200,250,200,150,300,150,200,250
Prepare a frequency table.
How many Workers are getting Rs 350?



Following figures relate the weekly wages (in Rs.) of 15 workers in a factory:
300,250,200,250,200,150,350,200,250,200,150,300,150,200,250
Prepare a frequency table.
What is the highest mark?



Class 11 Commerce Economics Extra Questions