Question: Use the data in books.dat for this problem. a. Plot replace vs. purchase for the raw data. b. Plot replace vs. purchase using the sampling

Use the data in books.dat for this problem.
a. Plot replace vs. purchase for the raw data.
b. Plot replace vs. purchase using the sampling weights.
c. Using a design-based approach, estimate the regression equation for predicting replace from purchase, along with its standard error. How many df would you use in constructing a CI for the slope?

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