Statistics Test

Result

Statistics Test - 8

Score
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Rank
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Weekly Quiz Competition

Question 1
1 / -0

Which of the following options represents the mode of 25, 26, 27, 24, 23, 22, 29, 21, 22, 19, 20, 22 and 27?

A
23

B
22

C
10

D
29

Solution

The given data is 25, 26, 27, 24, 23, 22, 29, 21, 22, 19, 20, 22, 27.
After arranging the data in ascending order, we get
19, 20, 21, 22, 22, 22, 23, 24, 25, 26, 27, 27, 29
Mode is the observation which occurs most frequently in the given data.
Here, 22 occurs most frequently, i.e. thrice in the given data. Therefore, 22 is the mode of the given data.
Question 2
1 / -0

The mean of a certain set of observations is 17. If 2 is subtracted from each observation, what is the new mean of the set of observations?

A
20

B
15

C
12

D
10

Solution

Mean of a certain set of observations = 17
If 2 is subtracted from each observation, then new mean = 17 – 2 = 15
Question 3
1 / -0

Which of the following options is the mode of 67, 37, 65, 37, 47, 37, 31, 19, 17 and 63?

A
50

B
67

C
37

D
17

Solution

Mode is the observation which occurs most frequently in the given data.
Here, 37 occurs most frequently, i.e. thrice in the given data.
So, 37 is the mode of the given data.
Question 4
1 / -0

The mean of a certain set of observations is 20. If each observation is divided by 2, then what will be the new mean of the set of observations?

A
5

B
10

C
12

D
40

Solution

Mean of the set of observations = 20
If each observation is divided by 2, then:
New mean = 20/2 = 10
Question 5
1 / -0

What is the mode of 45, 44, 43, 42, 41, 47, 46, 48, 49 and 44?

A
8

B
49

C
44

D
44.5

Solution

The given data is 45, 44, 43, 42, 41, 47, 46, 48, 49 and 44.
After arranging the data in ascending order, we get 41, 42, 43, 44, 44, 45, 46, 47, 48, 49.
Mode is the observation which occurs most frequently in a given data.
Here, observation 44 occurs most frequently, i.e. twice in the given data.
Thus, mode of the given data = 44.