Question: The following table gives rat body weights (in grams) and latency to seizure (in minutes), following injection of 40 mg/kg of body weight of metrazol.

The following table gives rat body weights (in grams) and latency to seizure (in minutes), following injection of 40 mg/kg of body weight of metrazol.

a. Draw a scatter diagram on graph paper, with latency plotted as a function of weight.
b. Determine the least-squares estimates of slope and intercept for the straight-line regression of latency on weight.
c. Test whether the slope is equal to 0. Use α = .10.
d. Test whether the intercept is equal to 0. Use α = .10.
e. Sketch the estimated regression line.
f. Distinctly sketch your choice for a regression line if it differs from that of part (e). Explain why you agree or disagree with part (e), noting whether any assumptions appear to be violated.

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