Here is Stata output from a one sample t-test trying to determine whether or not diastolic blood pressure readings were equal to a value of 50. Are mean diastolic blood pressure readings statistically different from a value of 50 at a=.01? Explain why. ttest bp==50 One-sample t test Variable I Obs Mean Std. Err Std. Dev. 1250 Cont . [Interval ] bp 200 52.775 6702372 478586 51.45332 541 09668 mean = mean(bp> 4. 1403 Ho: mean = 50 degrees of freedom 199 Ha: mean 50 Pr(T (t) - 0.6901 Pact - () - 0.0803