Answer: The variance of the data is 0.25, therefore second option is correct.
Explanation:
From the given graph it is noticed that the graph is symmetric along x = 4 or it is a bell shaped graph. So, the data follows the normal distribution.
The graph of normal distribution is bell shaped graph symmetric along the mean. The graph of normal distribution is shown below.
Since the given graph is symmetric along x = 4 therefore the mean of the data is 4.
Let the variance be
. So, the given data follows normal distribution with mean 4 and variance
.
In the below graph the point immediate left to the mean is
and in the given graph it 3.5
![\mu-\sigma=3.5](https://tex.z-dn.net/?f=%5Cmu-%5Csigma%3D3.5)
![4-\sigma=3.5](https://tex.z-dn.net/?f=4-%5Csigma%3D3.5)
![\sigma=0.5](https://tex.z-dn.net/?f=%5Csigma%3D0.5)
![\sigma^2=0.25](https://tex.z-dn.net/?f=%5Csigma%5E2%3D0.25)
Therefore, the variance of the data is 0.25, therefore second option is correct.
Answer:
A, y - 3 = -1/2(x + 1)
Step-by-step explanation:
To solve this problem, write each equation in the slope intercept form.
y - 3 = -1/2(x + 1)
Distributing -1/2 across each value in the parentheses, we get y - 3 = -1/2x - 1/2.
Adding 3 to both sides, we get y = -1/2x + 2 1/2.
Now that we have our equation, look at the graph. Is the equation correct? Yes, it is. The y-intercept is 2 1/2, and the slope is -1/2.
Answer:
$12
Step-by-step explanation:
u do 120 divided by 10 which gives u 12 which gives u per hours
hope this helps
Answer:
I believe it is (a). Correct me if I am wrong.
Step-by-step explanation:
18 can not be the number because the answer says six fewer. This means 6×3=18 is incorrect.
I would say -5.5., but I might be wrong.