2.25 but i am not sure i hope that helps
2. random samples are the least biased samples.
Multiply 15 x 3.14. You'll get 47.1. Thats the area
Answer:
pift^2(or your third option) is the area of a circle with a radius of 1.
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
