Answer:
Variance of difference between pre-exam and post-exam grades = 10.8
Step-by-step explanation:
Correlation (X,Y) = Covariance (X,Y) / √ { Variance (X) . Variance (Y) }
Given : Correlation (Pre & post exam grade) = 0.9 ; Variance (Pre exam grade) = 0.90 ; Variance (Post exam grade) = 16
So, 0.9 = Covariance (X,Y) / √ { 16 x 9 }
0.9 = Covariance (X,Y) / 12
Covariance (X,Y) = 12 x 0.9 = 10.8
Answer:
I can't seem to get the correct answer . I set it up as x (2x-7)=64, 2x^2-7x-64=0, (2x )(x ). And that's where I am stuck. Please help!
Step-by-step explanation:
the length of a rectangle is 7 inches less than twice its width. if the perimeter of the rectangle is 64 inches, find the dimensions of the rectangle.
Answer:
The probability is roughly 0.85%.
Step-by-step explanation:
This situation requires the combination of the probabilities in question.
The probability that Steph will make a throw is 90.3%, and from this we can conclude that the amount missed, or the probability of missing will be the remaining, or .
Let's combine the probabilities, remembering a percentage simply means a number over 100:
Answer:
D
Step-by-step explanation:
The solution to a system of equations given graphically is at the point of intersection of the 2 lines.
The x- coordinate of the point of intersection is approximately 5.5
Answer:
54
Step-by-step explanation: