the following table summarizes the outcome of a study that researchers carried out to determine if females are more fearful heights than males.What fraction represents the prioportion of people in this study who expressed fear of heights?                                                                               Men                                       Women expressed fear of heights                                        68                                             109 did not express a fear for heights                           94                                             89

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A: here sample size  = n= 18 so df =n-1 - 18-1  =17