A training center, wishing to demonstrate the effectiveness of their methods, tests some of their clients after different numbers of days of training, recording their scores on a sample test. Their data are:

a) Use the model to predict the correct responses for each number of training days.

b) Find the residuals,

c) Calculate the residual standard deviation,

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Training Days Correct Responses 1 4 4 6 8 7 129 10 12 9 10 The regression model they calculate is correct responses = 3.525 + 0.525 Training days.