Answer:
So, the sample mean is 31.3.
So, the sample standard deviation is 6.98.
Step-by-step explanation:
We have a list of data for the speeds (in miles per hour) of the 20 vehicles. So, N=20.
We calculate the sample mean :
So, the sample mean is 31.3.
We use the formula for a sample standard deviation:
Now, we calculate the sum
Therefore, we get
So, the sample standard deviation is 6.98.
Here we are given the specific equation of:
amount of eroded soil = 0.4 + 1.3 x
where x is the flow rate
A linear equation has a general formula in the form of:
y = m x + b
where m is the slope and b is the y intercept of the equation
If we compare this with our specific equation, we can see that the slope and y intercept are both positive with values:
m = 0.4
b = 1.3
Therefore this only means that as the flow rate increases, the amount of eroded soil also increases.
Hence the correlation must be positive but we cannot solve for the exact value since we need the data for x and y.
Answer:
positive, but we cannot say what the exact value is
Step-by-step explanation:
Sequence 1:
term1=26
term2=26-3=23
term3=23-3=20
term4=20-3=17
term5=17-3=14
sequence2:
term1=-3
term2=-3+10=7
term3=7+10=17
term4=17+10=27
term5=27+10=37
Answer:
Can't See the question
Step-by-step explanation:
Answer: (13, -8)
Step-by-step explanation:
Subtract 5 from -3
Add 5 to 8
