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Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Opposite angles in a parrellelogram are