A data analyst wants to test the hypothesis that average fuel efficiency $($mpg$)$ is significantly different between car she obtained the following results: Level of significance $=5\backslash \%$; p value$=0\mathrm{.}718$ Observed value of the test statistic $=0\mathrm{.}98$ Critical value of the test statistic$=3\mathrm{.}64$; n $=74$ What are the degrees of freedom in this test? $7170727469$