Scientists recorded the dry weight (mg) and corolla diameter (cm) of 86 evening primrose (O. har-ringtonii) flowers growing in a natural habitat.21
(a) Use the following computer output, from fitting a regression model, to construct a 95% confidence interval for β1.
(b) Interpret the confidence interval from part (a) in the context of this setting.
(c) Does the confidence interval from part (a) include zero? How is this related to the F-value given in the computer output?

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Estimate Std. Error t value PrItI) Intercept) 31.32 12.49 2.51 0.014 corolla 2.29 0.23 9.97 <2e-16