Statistics Test

Result

Statistics Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

A student collects information about the number of school going children in a locality consisting of a hundred households. The data collected by him is

A
Arrayed data

B
Grouped data

C
Secondary data

D
Primary data

Solution

Data obtained through the information collected by the investigator herself or himself with defininte objective in his/her mind is called as primary data.
Question 2
1 / -0

To analyse the election results, the data is collected from a newspapers. The data thus collected is known as

A
grouped data

B
secondary data

C
primary data

D
raw data

Solution

Secondary data is the readily available data collected by someone else & published in newspapers or journals etc.
Question 3
1 / -0

Which of the following variables are discrete ? 1. Size of shoes, 2. Number of pages in a book, 3. Distance travelled by a train, 4. Time

A
2 and 4

B
1 and 4

C
1 and 3

D
1 and 2

Solution

Discrete variables are variables that can only take finite values.

Size of shoes & pages in the book have finite number.
Question 4
1 / -0

For a given data, the difference between the maximum and minimum observation is known as its

A
class

B
class mark

C
class limit

D
range

Solution

Difference between maximum & minimum value of observation is called as range.
Question 5
1 / -0

In an examination, ten students scored the following marks: 60, 58, 90, 51, 47, 81, 70, 95, 87, 99. The range of this data is

A
60

B
52

C
81

D
51

Solution

Difference between the maximum & minimum value of the observation is called as range.

So, 99-47=52
Question 6
1 / -0

The range of the data 20, 8, 20, 18, 16, 15, 30, 12, 22, 6, 11, 17, 25, 32, 10, 19 is

A
18

B
15

C
26

D
16

Solution

Difference between the maximum & minimum value of the observation is called as range.

So, 32-6=26
Question 7
1 / -0

A data is such that its maximum value is 75 and range is 20, then the minimum value is

A
75

B
95

C
20

D
55

Solution

Difference between the maximum & minimum value ot the observations is called as range.

Let, minimum value be 'x'

75-x=20

So, x=55
Question 8
1 / -0

The minimum value of a data is 82 and range is 38, then the maximum value is

A
76

B
82

C
120

D
60

Solution

Difference between the maximum & minimum value of the observation is called as range.

Let maximum value be x

So,

x − 82 = 38

x = 82 + 38

x = 120
Question 9
1 / -0

In a grouped frequency distribution, the class intervals are 0-10, 10-20, 20-30, .., then the class width is

A
30

B
10

C
15

D
20

Solution

The class width is the difference between the upper or lower class limits of consecutive classes. In this case, class width equals to the difference between the lower limits of the first two classes.

w=10−0

so class width is 10
Question 10
1 / -0

In a grouped frequency distribution, the class intervals are 1-20, 21-40, 41-60, . . , then the class width is

A
20

B
10

C
40

D
30

Solution

The class width is the difference between the upper or lower class limits of consecutive classes.

In this case, class width equals to the difference between the lower limits of the first two classes.

Let, W be the class width

W = 21 − 1 = 20

so class width is 20

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Re-Attempt Weekly Quiz Competition

Statistics Test - 4

Result

Statistics Test - 4

Score

-

Rank

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SHARING IS CARING

Question 1

Arrayed data

Grouped data

Secondary data

Primary data

Solution

Question 2

grouped data

secondary data

primary data

raw data

Solution

Question 3

2 and 4

1 and 4

1 and 3

1 and 2

Solution

Question 4

class

class mark

class limit

range

Solution

Question 5

60

52

81

51

Solution

Question 6

18

15

26

16

Solution

Question 7

75

95

20

55

Solution

Question 8

76

82

120

60

Solution

Question 9

30

10

15

20

Solution

Question 10

20

10

40

30

Solution

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