Answer:
It's a bit unclear with the table this way, but I count fifteen points, fifteen lines of the table, each a pair of numbers.
That's 15 degrees of freedom in the data. When modeling, each parameter in the model uses up one degree of freedom, so you'd use a smaller number of degrees of freedom when calculating t statistics, etc.
Given:
m is directly proportional to the cube of h.
m = 525 when h= 5.
To find:
The equation connecting m and h.
Solution:
m is directly proportional to the cube of h.
![m\propto h](https://tex.z-dn.net/?f=m%5Cpropto%20h)
...(i)
Where, k is the constant of proportionality.
Putting m = 525 and h= 5, we get
![525=k(5)](https://tex.z-dn.net/?f=525%3Dk%285%29)
![\dfrac{525}{5}=k](https://tex.z-dn.net/?f=%5Cdfrac%7B525%7D%7B5%7D%3Dk)
![105=k](https://tex.z-dn.net/?f=105%3Dk)
Putting k=105 in (i), we get
![m=105h](https://tex.z-dn.net/?f=m%3D105h)
Therefore, the required equation is
.
The average is 105.5. To find the average, you have to add up all numbers, 63+148=211. Now you have to divide by how many numbers there are, 211÷2=105.5
Answer:
4 times 312 = 1,248 = 312 times 4 = 1,248
Hope this helps, sorry if it didn't.