Answer:
(-1,5)
Step-by-step explanation:
up the x corridor and down the y axis.
B) 4Na + O₂ → 2Na₂O
b) H₂ + Cl₂ ---> 2HCi
Answer:
b
Step-by-step explanation:
Answer:
We have strong evidence that on average, students study less than 150 minutes per night during the school week
Step-by-step explanation:
Normal distribution:
mean μ₀ = 150
Sample:
Sample size n = 272
Sample mean x = 141
Sample standard deviation s = 66
The standard error of the sample mean SE = σ /√n
SE = 66/√272
SE = 66 / 16,49
SE = 4
Test Hypothesis:
Null hypothesis H₀ x = μ₀
Alternative hypothesis Hₐ x < μ₀
z(s) test statistics is:
z(s) = ( x - μ₀ ) / s/√n
z(s) = - 9 /4
z(s) = - 2,25
p-value for that z(s) p-value = 0,0122
Then for α = 0,05 p-value < 0,05
We are in the rejection region we need to reject H₀
Answer:
Step-by-step explanation:
R=5
T=4.5
D=22.5
5x4.5=22.5
Maybe this is right ? Hope it helps
