The answer is 5.5
The standard deviation (sd or σ) of the sample mean difference is:
sd = √(sd₁²/n₁ + sd₂²/n₂)
For the population A:
sd₁ = 17.6
n₁ = 25
For the population B:
sd₂ = 21.2
n₂ = 30
Hence:
sd = √(sd₁²/n₁ + sd₂²/n₂)
= √(17.6²/20 + 21.2²/30)
= √(309.76/20 + 449.44/30)
= √(15.49 + 14.98)
= √(30.47)
= 5.5
If it's 5cm x 5 cm x 5cm
Volume is a3
so 125cm
Answer:
1.8
-2.2
1.8
-2.2
-1.8
-1.8
2.2
2.2
Step-by-step explanation:
Right or above 0 are positive
Left or below 0 are negative
Answer:
no 146.5 > 145
Step-by-step explanation:
