A researcher believes that as age increases, the grip strength (pounds per square inch, psi) of an
Question:
(a) Treating age as the explanatory variable, determine the estimates of β0 and β1.
(b) Assuming the residuals are normally distributed, test whether a linear relation exists between the explanatory variable, age, and response variable, grip strength, at the α = 0.05 level of significance.
(c) Based on your answer to (b), what would be a good estimate of the grip strength of a randomly selected 42-year-old female?
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