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1
The collected data can be represented pictorially using
1. Pictograph
2. Mean
3. Histogram
4. Frequency Polygons.
Only 1 and 2
Only 2 and 3
Only 1, 3 and 4
Only 2, 3 and 4
2
The mean of first ten whole numbers is _____________
4
5.5
6
4.5
3
Find the frequency of Class 60-80 by using the given data:
17
77
7
70
Median divides the total frequency into _________________ equal parts.
Four
Three
Two
Five
5
When an investigator collects data by using a proper form and with a definite plan is called_______________.
Primary data
Organised data
Un - organised data
Secondary data
The arithmetic mean of first ten natural numbers is _______________
7.5
10
From the following frequency table, find out how many students failed if the pass marks are 40.
29
8
14
The number of times a particular observation occurs in a given data is called ________________
Its Range
Its Frequency
Its Mean
None of These
9
Which of the following statement is not 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.
Only 1
Only 2
Only 3
1, 2 and 3
11
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
12
Which of the following statement is true regarding range of data:
Only 1 and 3
13
3. To calculate it we find the maximum and the minimum value in the data, and then the difference between the two is calculated.
In which year the difference between the highest and the average marks in Maths was maximum ?
2009
2010
2008
2007
15
30 children were asked about the number of hours, they watched TV programs in previous week. The results are as follows: 1, 6, 2, 3, 5, 12, 5, 8, 4, 8 10, 3, 4, 12, 2, 8, 15, 1, 17, 6, 3, 2, 8, 5, 9, 6, 8, 7, 14, 12 . How many children watch TV between 10-15 hours?
16
A survey was carried out for the purpose of determining the number of children in each family. The results are shown in the table below. Calculate the percentage of families which have more than 2 children.
35%
40%
60%
75%
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
18
Calculate the range of the given sets of data
7,47,8,42,47,95,42,96,2
84
71
94
19
The mean of 8, 11, 6, 14, x and 13 is 16. Find the value of the observation x.
34
45
44
43
20
Identify the incorrect 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.
None of these