A sample of n=8 scores has a mean of m=12. What is the value of ∑x for this sample
Answer: We are given the mean of 8 scores is 12.
We are required to find the sum of these 8 observation's, ![\sum x](https://tex.z-dn.net/?f=%5Csum%20x)
We know that:
![\bar{x}=\frac{\sum x}{n}](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%3D%5Cfrac%7B%5Csum%20x%7D%7Bn%7D)
We are given:
![\bar{x} = 12, n=8](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%20%3D%2012%2C%20n%3D8)
![\therefore 12=\frac{\sum x}{8}](https://tex.z-dn.net/?f=%5Ctherefore%2012%3D%5Cfrac%7B%5Csum%20x%7D%7B8%7D)
![\sum x = 12 \times 8](https://tex.z-dn.net/?f=%5Csum%20x%20%3D%2012%20%5Ctimes%208)
![\sum x=96](https://tex.z-dn.net/?f=%5Csum%20x%3D96)
Hence, sum of 8 observation's, ![\sum x =96](https://tex.z-dn.net/?f=%5Csum%20x%20%3D96)
Answer:
x = 2
y = 5
Step-by-step explanation:
3x + y = 11 equation (1)
-x + y = 3 multiply this equation by -1
x - y = -3 equation (2)
by adding 2 equations
4x = 8
x = 2
by sub. in Equation (2)
2 - y = -3
y = 2+3
y = 5
Answer:
D.) (5, 3)
Step-by-step explanation:
Solution is where two lines intersect
Both lines intersect at x = 5 and y = 3
Answer
D.) (5, 3)
The height of Maury's room is 8.4 ans maury is 6.6 feet tall. The distance between the celling and Maury's head is exactly 1.8. She wants to hang the celling fan 1.875 feet away from the celling that is all the head room she has the celling fan would hit her head.