Answer:
14.625
Step-by-step explanation:
As per the situation the solution of mean and standard deviation change, based on all 12 samples is represented below:-
Mean of all 12 samples is shown below:-
So, the Mean = 23.5
and now,
The Standard deviation of all 12 samples is shown below:-
= 14.625
Therefore, we used the above equation to reach the answer.
Answer:
<h2>(55/27, 32/9)</h2>Step-by-step explanation:
The system of equations is
The first step is to arrange like terms in colums, which is already done.
Then, we need to multiply a number by one equation in such way where we get opposite like terms. Notice that we need to multiply the first equation by -1
Then, we sum equations to obtain the value of one variable.
Now, we use this value to find the second variable
Therefore, the solution is (55/27, 32/9).
(The image attached shows the graphic solution)
