Find a confidence interval for the slope that would describe the association between all hand spans and number of Tootsie Rolls grabbed. Is zero in this interval? Does this make sense based on the p-value from your test of significance?

Is hand span a good predictor of how much candy you can grab? Using 45 college students as subjects, researchers set out to explore whether a linear relationship exists between hand span (cm) and the number of Tootsie Rolls* each subject could grab.