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1
Which of following statements are true for secondary data
1. Data is not originally collected rather obtained from published or unpublished sources.
2. Secondary data are collected by an individual or an institution for some purpose and are used by someone else in another context.
3. The secondary data should be used with great care.
Only 1 and 2
Only 2 and 3
Only 1 and 3
1, 2 and 3
2
Which of following statements are true for primary data
1. When an investigator collects data by using a proper form and with a definite plan.
2. Data are reliable and relevant because they are original in character.
3. Data are collected by some individuals or by some institutions or by research bodies.
3
What is the relation among mean, median and mode?
Mode = 3 median - 2 mean
Mode = 2 median - 3 mean
Mode = 3 mean - 2 median
Mode = 2 mean - 3 median
4
A random survey of numbers of children of various age group playing in a park was found as follows. Children playing between the age group of 3-5 years are:
5
9
6
7
Find the frequency of Class 60-80 by using the given data:
17
77
70
Find the mode of 2, 4, 5, 2, 1, 2, 3, 4, 4, 6, 2.
A random survey of numbers of children of various age group playing in a park was found as follows. Children playing between the age group of 15-17 years are:
8
To find the mode of a grouped data, the size of the classes is ________________.
Uniform
Non- uniform
Proportional
None of these
Identify the correct statement.
1. Statistics is the branch of mathematics that deals with analysis of the data that has been collected.
2 This analysis can used in various predictions and plannings.
2. Statistics deal with the collections, classification, graphical representation, analysis and interpretation of data.
Only 1
Only 2
Only 3
1, 2 and 3 are correct
10
In which year the difference between the highest and the average marks in Maths was maximum ?
2009
2010
2008
2007
11
Which of the following statement is true regarding range of data:
1. It tells us how widely the numbers are spread.
2. It is the difference of the highest and the lowest observation.
3. It is the average number of observations.
12
A random survey of numbers of children of various age group playing in a park was found as follows. Children playing under the age of 7 years are:
24
22
26
13
If the mean of the following distribution is 20. The value of x is _____________.
30
20
14
The mean of the given data 16, 18, 19, 21, 23, 23, 27, 29, 29, 35 is _________________.
15
Which one of the following is not correct:
1. Statistics is liable to be misused.
2. The data collected by the investigator is known as raw data.
3. Statistical results are accurate.
4. Statistical data takes individual data into account.
Only 2 and 4
Only 3 and 4
16
The total of frequency up to an upper class limit or boundary is known as _____________________.
Average frequency
Cumulative frequency
Frequency distribution
Frequency polygon
The mean of the data: 2.2, 10.2, 14.7, 5.9, 4.9, 11.1, 10.5 is ______________.
9.6
8.8
8.5
9.4
18
The mode of the data : 1, 7, 2, 4, 5, 9, 8, 3 is ____________.
Mode Does Not Exist
19
The inclusive form of class boundary the value 19.4 will lie in ___________________class interval.
10 - 20
20 - 30
30 - 40
The inclusive form of class boundary the value 20 will lie in ___________________class interval.