The following information is obtained from a sample Assume t

The following information is obtained from a sample. Assume the standard deviation of the population is known. N = 650 x = 1.05 sigma = 5.22 Construct a 95% confidence interval for mu. Information on GPA (x) and starting salary (y) was collected for seven recent college The results are summarized as follows. summation x = 20.57 summation y = 322 summation xy = 955 summation x^2 = 63.8111 summation y^2 = 15600 Find the least-squares regression line for these data. Interpret the slope and y-intercept. Predict the starting salary for a 4.0 GPA.

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