What is the value of x? 30 45 55 60
2 answers:
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Answer:
The margin of error for the mean is of 165.18 points.
Step-by-step explanation:
We have the standard deviation of the sample, so we use the t-distribution to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 81 - 1 = 80
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 80 degrees of freedom(y-axis) and a confidence level of . So we have T = 1.9901
The margin of error is:
M = T*s = 1.9901*83 = 165.18.
In which s is the standard deviation of the sample.
The margin of error for the mean is of 165.18 points.
Answer:
first answer
Step-by-step explanation:
(8x³ - 22x² - 4) / (4x - 3)
when you do long division you get the first answer
