Just to be clear, the data are reported in the picture attached.
We set the difference in graffiti incidents between before (B) and after (A) as:
d = A - B
If the number of incidents has indeed reduced, then d will be negative.
In order to choose the hypothesis, we need to recall that the null hypothesis H₀ represents the statement that we want to prove wrong, while the alternative hypothesis H₁ represents the statement that we want to prove right.
Therefore, we want μd to be strictly negative (= 0 would mean that the number of incidents stayed constant).
Hence:
H₀ : μd ≥ 0H₁ : μd < 0
Answer:
8/100
Step-by-step explanation:
1. m=1/2 b=4 y=1/2x+4
2. m=-1/2 b=-3 y=-1/2x-3
3. m=-3/2 b=-1 y=-3/2x-1
4. m=1/2 b=-1 y=1/2x-1
U gotta use pythagorean theory
So a^2 +b^2 = c^2
C=7 since its the one facing the right angle
5.2^2 + b^2 = c2
27.04 +b^2= 49
Subtract 21.96 from both sides, so ur left with 21.96=b^2
Under the square root and rounded up would equal 4.7
Hope this helps