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1
Median is that measure of central tendency which divides the total frequency into _________________ equal parts.
Four
Three
Two
Five
2
The arithmetic mean of first ten natural numbers is _______________
5.5
6
7.5
10
3
In a city, the weekly observations on the cost of living index made in a study are given in the following table :
What is the class mark of interval 158 - 168 ?
158
164
168
163
4
From the frequency table, the percentage of families with less than 3 children is Find the value of x:
7
15
11
18
5
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 7-10 years are:
9
12
Empirical formula involves :
Mode, range and class mark
Median, mode and range
Mean, mode and median
Range, frequency and class mark
The mean of the data : 9, 7, 11, 13, 2, 4, 5, 5 is _______________
8
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 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.
Only 1 and 2
Only 2 and 3
Only 1 and 3
1, 2 and 3
Supposing that there were 40 students in science in the year 2009 . How much total of marks did they receive combined together ?
2800
2720
2560
3000
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 17 hours?
3. To calculate it we find the maximum and the minimum value in the data, and then the difference between the two is calculated.
13
In which year the difference between the highest and the average marks in Maths was maximum ?
2009
2010
2008
2007
14
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
In the exclusive form of class boundary the value 19.4 will lie in the _________________ class interval.
10 - 20
20 - 30
30 - 40
None of these
16
The arithmetic mean for the following frequency distribution is_________________.
CLASS INTERVAL
FREQUENCY1
14.5
28.3
17
The scores obtained by a group of participants in a game are shown in the table. A participant who scores more than 3 points receives a hamper. If the number of participants who do not receive hampers is twice the number of those who do, find the value of y.
32
68
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.
Only 1
Only 2
Only 3
19
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
20
The frequency table shows the marks obtained by a group of students in a monthly test. Calculate the percentage of students who failed the test if 40 is the passing mark.
3%
12%
15%
30%