Jordan's average monthly expenses are $450 less than half of her monthly income. The sum of her average monthly expenses and mon
2 answers:
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Answer:
Step-by-step explanation:
Given data :
Sample standard deviation, s = 15
Sample mean,
n = 23
a). 98% confidence interval
∴
So, 98% CI is
Explanation:
Basically, you can do it in many ways. But just, in my opinion, exactly linear algebra was made for such cases.
the optimal way is to do it with Cramer's rule.
First, find the determinant and then find the determinant x, y, v, u.
Afterward, simply divide the determinant of variables by the usual determinant.
eg. and etc.
I think that is the best way to solve it without a hustle of myriad of calculations reducing it to row echelon form and solving with Gaussian elimination.