Answer:
We have a strong negative relationship between the variables.
Step-by-step explanation:
Given two random variables X and Y, it is possible to calculate the covariance as Cov(X, Y) = E(XY)-E(X)E(Y). We have E(X)=5, E(Y)=6 and E(XY)=21. Therefore Cov(X,Y)=21-(5)(6)=21-30=-9. On the other hand, we know that the correlation of X and Y is the number defined by 
and because in this particular case we have V(X)=9 and V(Y)=10, we have 
= -0.9487. Therefore, we have a strong negative relationship between the variables.
Answer:
P(1 and 2 are green) = 3/25
Step-by-step explanation:
We need to know the total number of marbles
6 Blue + 10 red + 9 green = 25 marbles
P ( 1st marble is green) = green/ total
= 9/25
Since we don't put it back, there are
6 Blue + 10 red + 8 green = 24 marbles
P ( 2st marble is green) = green/ total
= 8/24 = 1/3
P(1 and 2 are green) = P(1st green) * P(2nd green)
= 9/25 * 1/3
= 3/25
To make it simple make them all the same fraction
6/24 to trim 4/24 to style and she wants to work for 80/24 hours for 5 days
if each appointment she wants to take 6/24 to trim and 4/24 to style then every appointment will take 10/24 of an hour.
she wants to do 80/24 so she can do 8 appointments a day if each take 10/24
8 appointments a day 5 days a week
8x5= 40
Answer:
C. 1/25
Step-by-step explanation:
I assume this is a fair spinner and the probability of landing in all colors is equal.
First spin:
p(purple) = 1/5
Second spin:
p(purple) = 1/5
The two spins are independent events, so the probability of landing on purple twice is the product of the two individual probabilities.
p(purple and purple) = 1/5 * 1/5 = 1/25
Answer:
O 20.8 centimeters
Step-by-step explanation:
Guessed on Edge and got it right.
