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Chapter 8: Statistics And Probability
- Online Test
Chapter 8: Statistics And Probability
TEST : 1
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q1.
Which of the following is not a measure of dispersion?
A.
Range
B.
Standard deviation
C.
Arithmetic mean
D.
Variance
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Answer :
Option C
Explaination / Solution:
No Explaination.
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q2.
The range of the data 8, 8, 8, 8, 8 . . . 8 is
A.
0
B.
1
C.
8
D.
3
View Solution
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Answer :
Option A
Explaination / Solution:
Range = L - S = 8 - 8 = 0
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q3.
The sum of all deviations of the data from its mean is
A.
always positive
B.
always negative
C.
zero
D.
non-zero integer
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Answer :
Option C
Explaination / Solution:
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q4.
The mean of 100 observations is 40 and their standard deviation is 3. The sum of squares of all deviations is
A.
40000
B.
160900
C.
160000
D.
30000
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Answer :
Option B
Explaination / Solution:
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q5.
Variance of first 20 natural numbers is
A.
32.25
B.
44.25
C.
33.25
D.
30
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Answer :
Option C
Explaination / Solution:
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q6.
The standard deviation of a data is 3. If each value is multiplied by 5 then the new variance is
A.
3
B.
15
C.
5
D.
225
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Answer :
Option D
Explaination / Solution:
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q7.
If the standard deviation of
x, y, z
is
p
then the standard deviation of 3
x
+ 5 , 3
y
+ 5 , 3
z
+ 5 is
A.
3
p
+ 5
B.
3
p
C.
p
+ 5
D.
9
p
+ 15
View Solution
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Answer :
Option B
Explaination / Solution:
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q8.
If the mean and coefficient of variation of a data are 4 and 87.5% then the standard deviation is
A.
3.5
B.
3
C.
4.5
D.
2.5
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q9.
Which of the following is incorrect?
A.
P
(
A
) > 1
B.
0 ≤
P
(
A
) ≤ 1
C.
P
(ɸ) = 0
D.
P
(
A
) +
P
(
) = 1
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
No Explaination.
# Chapter 8: Statistics And Probability
# TN 10th Maths
Prepare / Learn
Q10.
The probability a red marble selected at random from a jar containing
p
red,
q
blue and r green marbles is
A.
B.
C.
D.
View Solution
Add Work Space
Answer :
Option B
Explaination / Solution:
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