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cricket20 [7]
2 years ago
13

100 points and brainliest for correct answer!

Mathematics
1 answer:
MatroZZZ [7]2 years ago
4 0
Answer B.

∑fx=1637,∑fx
2
=127663,∑f=21
x
ˉ
=Mean=
∑t
∑fx
​
=77.95
σ
2
=
∑f
∑fx
2

​
−(
x
ˉ
)
2
=
21
127663
​
−(77.95)
2
=2.987
σ=1.728
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