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JAMB Mathematics 2024 Paper
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© africaexams.com
Question : 34
Total: 50
Find the variance of a group of data whose standard deviation is 12.34 to the nearest whole number.
150
151
152
153
Validate
Solution:
Concept:
Variance is the square of the standard deviation.
Explanation:
Given standard deviation
=
12.34
= 12.34
=
12.34
.
Variance
=
(
standard deviation
)
2
\text{Variance} = (\text{standard deviation})^2
Variance
=
(
standard deviation
)
2
.
Variance
=
(
12.34
)
2
=
152.2756
\text{Variance} = (12.34)^2 = 152.2756
Variance
=
(
12.34
)
2
=
152.2756
.
Rounding
152.2756
152.2756
152.2756
to the nearest whole number gives
152
152
152
.
Answer:
C.
152
152
152
© africaexams.com
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