Answer:
Option 2: 1.5 is the correct answer.
Step-by-step explanation:
Given information is:
Mean = μ = $27
SD = σ = $5.50
A z-score simply tells us how far a selected data value from the mean is.
Z-score is denoted by z and is given by the formula:
Let x = $35.25
Putting the values of mean and SD we get,
The value of z-score for a price of $35.25 per barrel is 1.5
Hence,
Option 2: 1.5 is the correct answer.
Answer:
y=-3x+5
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-4-(-1))/(3-2)
m=(-4+1)/1
m=-3/1
m=-3
y-y1=m(x-x1)
y-(-1)=-3(x-2)
y+1=-3x+6
y=-3x+6-1
y=-3x+5
For this case the first thing you should know is that if the coefficient of determination (R) is equal to 1, the graph is totally perfect.
Therefore, the closer the value of R is to one, the mathematical model will be the most appropriate.
We have then:
The coefficient of determination for the linear model was 0.95.
Therefore, the mathematical model must be linear.
Answer:
A model that should be used to represent the data set is:
A linear
